Class / Patent application number | Description | Number of patent applications / Date published |
398072000 | Bidirectional | 78 |
20080247756 | Method and Apparatus for Transmitting Multiple Channels in a Wavelength Division Multiplexed (WDM) Optical Communication System With Reduced Raman Crosstalk and Nonlinear Distortions - A method and apparatus is provided for transmitting a WDM optical signal. The method begins by modulating an odd number of optical channels that are each located at a different wavelength from one another with (1) a respective one of a plurality of information-bearing electrical signals that all embody the same broadcast information and (2) a respective one of a plurality of RF signals having a common functional broadcast waveform, at least one of the RF signals being out of phase with respect to remaining ones of the plurality of RF signals. Each of the modulated optical channels are multiplexed to form a WDM optical signal. The WDM optical signal is forwarded onto an optical transmission path. | 10-09-2008 |
20080267627 | Passive Optical Network with Partially-Tuned Lasers - A passive optical network (PON) component comprising a processor coupled to a plurality of receivers, the processor configured to monitor a plurality of drifting laser wavelengths and cause the drifting laser wavelengths to be tuned to a plurality of pass-bands. Also disclosed is an optical network unit (ONU) comprising a receiver, a transmitter coupled to the receiver, and a partially-tunable laser coupled to the transmitter and having a drifting laser wavelength, wherein the drifting laser wavelength is periodically tuned to one of a plurality of pass-bands. Included is a method comprising monitoring a plurality of drifting laser wavelengths associated with a plurality of pass-bands, and reconfiguring a plurality of time division multiple access (TDMA) timeslots when one of the drifting laser wavelengths migrates from one pass-band to another pass-band. | 10-30-2008 |
20080279556 | Wavelength Division Multiplexed Passive Optical Network - Data is transmitted between a central office and customer premises by a wavelength division multiplex passive optical network. Two laser beams with separate wavelengths are transmitted from the central office to an optical network unit in the customer premises. Both laser beams carry downstream data. One laser beam is intensity modulated by on/off keying. The other laser beam is phase modulated by differential phase shift keying, which maintains a constant optical intensity. The first laser beam is received by a first optical receiver, which demodulates the first downstream data. The second laser beam is split in two. One laser beam is sent to a second optical receiver, which demodulates the second downstream data. The other laser beam is sent to a reflective semiconductor amplifier, which modulates the beam with upstream data and transmits the beam back to a receiver in the central optical system. | 11-13-2008 |
20080310842 | DOCSIS COMPATIBLE PON ARCHITECTURE - In one embodiment, systems for transporting a signal between at least one control point and a user device, comprising a passive optical network operatively coupled to the at least one control point and an optical network termination operatively coupled to the passive optical network and operatively coupled to the user device, wherein the optical network termination comprises an upstream laser and an upstream laser driver coupled to the upstream laser and an upstream laser driver trigger, the upstream laser driver trigger is configured to activate the upstream laser driver and initiate an upstream signal in compliance with Data Over Cable Service Interface Specification (DOCSIS) from the user device to the at least one control point. | 12-18-2008 |
20080310843 | PASSIVE OPTICAL NETWORK SYSTEM FOR THE DELIVERY OF BI-DIRECTIONAL RF SERVICES - A system for providing bi-directional RF services over relating to a point-to-multipoint Passive Optical Network (PON). | 12-18-2008 |
20090060510 | Optical Network Terminal Apparatus - A distributed optical network terminal apparatus includes an n-plexer selecting a plurality of downstream channels of a received wavelength division multiplexed (WDM) optical signal. A wavelength translator block translates each selected channel of the WDM optical signal to an associated downstream translated optical signal having a wavelength distinct from that of the associated channel. | 03-05-2009 |
20090067841 | FIBER AND WIRE COMMUNICATION SYSTEM - This invention provides a new architecture for a communication system between head-ends and end-users which expands bandwidth and reliability of the communication system. A mux-node receives communication signals from a head-end and forwards the received communication signals to one or more mini-fiber nodes. The connection to the head-end is via a small number of optical fibers and the connections to each of the mini-fiber nodes may be via one or more optical fibers that may provide full duplex communication. The head-end may communicate with the mux-node using digital or digital and analog signals. The mini-fiber nodes may combine the signals received from the head-end with loop-back signals used for local media access control prior to forwarding the signals to the end-users. Upstream data are received by the mini-fiber nodes and transmitted to the mux-node. The mux-node may route upstream communication signals received from the mini-fiber nodes as downstream signals to other mini-fiber nodes also connected to the mux-node without head-end interaction. | 03-12-2009 |
20090080890 | OPTICAL REPEATER DEVICE AND OPTICAL TRANSMISSION SYSTEM - An optical repeater device of the present invention comprises: a preamble compensating circuit | 03-26-2009 |
20090092390 | Wavelength-Division Multiplexed Passive Optical Network For Embodying Wavelength-Independent Operation of Wavelength-Locked Fabry-Perot Laser Diodes by Injecting a Low Noise Broadband Light Source - The present invention relates to a wavelength-division multiplexed passive optical network (WDM-PON) which embodies wavelength-independence of wavelength-locked Fabry Perot-Laser Diode (F-P LD). A WDM-PON of the present invention comprises an optical fiber being used for optical transmission to and from a broadband light source (BLS) with a low noise characteristic; first arrayed waveguide Gratings (AWG) for filtering light transmitted from the BLS which is oscillated in a plural mode into a group of n numbers wherein the first AWG have a bandwidth broader than a bandwidth of one mode of the BLS; n F-P LDs outputting wavelength-locked light by light being injected through the first AWG; a circulator bypassing and outputting wavelength-division multiplexed signals which are inputted through the first AWG and the optical fiber; and second AWG de-multiplexing the WDM signals into a group of n numbers wherein the second AWG have a bandwidth broader than the bandwidth of the BLS to be injected, wherein the number n is either the number of output ports of the first or second AWG or the number of channels of the WDM signals. | 04-09-2009 |
20090103922 | TDM/WDMA PASSIVE OPTICAL NETWORK DEVICE - Provided is a time division multiplex (TDM)/wavelength division multiple access (WDMA) passive optical network (PON) device. The TDM/WDMA PON device comprises a base station terminal, a wavelength splitter, and a subscriber terminal optical transceiver. The base station terminal comprises a transmitter time-division-multiplexing and simultaneously modulating and outputting a plurality of different wavelength optical signals, an optical circulator transmitting the optical signals output from the transmitter to an optical distribution network and transmitting optical signals received from the optical distribution network to a receiver and the receiver demultiplexing wavelength division multiplexed upstream signals from the optical distribution network through the optical circulator, converting the demultiplexed upstream signals into a plurality of electrical signals, and delivering the electrical signals to an upper layer. The wavelength splitter splits the downstream signals from the base station terminal to subscriber ports corresponding to wavelengths and multiplexes the optical signals received from each of the subscriber ports to the base station terminal. The subscriber terminal-optical transceiver receives the downstream signals from the wavelength splitter and reuses the received downstream signals as optical sources for upstream signals. | 04-23-2009 |
20090185807 | Wavelength Division Multiplexing Passive Optical Network for Providing Both of Broadcasting Service and Communication Service and Central Office Used Thereof - Disclosed is a wavelength division multiplexing passive optical network for simultaneously providing a broadcasting service and a data service by employing a broadband light source, which uses mutually injected Fabry-Perot laser diodes, as well as a central office used for the same. | 07-23-2009 |
20090196612 | Optical modulation method and system in wavelength locked fp-ld by injecting broadband light source using mutually injected fp-ld - The present invention relates to an optical modulation method and optical modulation system of a wavelength locked Fabry Perot-Laser Diode (FP-LD) by injecting a broadband light source (BLS) using mutual injection of FP-LDs. More specifically, the present invention relates to a novel modulation technology which embodies a wavelength locked FP-LD capable of being used as an economic light source in an optical network based on a wavelength-division multiplexing passive optical network (WDM-PON). According to the present invention, a light modulation system is suggested comprising: BLS being constructed by mutual injection between two FP-LDs and an optical fiber being used for light transmission; first AWG for filtering light from a plurality of oscillation modes of the BLS into n group; n FP-LDs outputting wavelength locked light which is divided through the first AWG; an encoder being provided at a transmitting end of a subscriber to which the output from the first AWG is transmitted; a circulator outputting light which is inputted through the first AWG; second AWG de-multiplexing WDM signals from the first AWG into n group; and a decoder being provided at a receiving end to which the output from the second AWG is transmitted. Therefore, the present invention makes it possible to provide a more economic light source for WDM-PON subscribers by embodying a wavelength locked FP-LD by injecting a low-cost BLS. | 08-06-2009 |
20090208212 | BIDIRECTIONAL WAVELENGTH-DIVISION-MULTIPLEXED PASSIVE OPTICAL NETWORK - Provided is a bidirectional wavelength division multiplexed passive optical network (WDM-PON) which includes a central office (CO) that transmits and receives multiplexed optical signals, a remote node (RN) that communicates with the CO, receives a multiplexed optical signal to demultiplex, and receives a demultiplexed optical signal to multiplex, an optical network unit (ONU) that transmits and receives demultiplexed optical signals to and from the RN, operational and protective backbone optical fibers that connect the CO to the RN, and operational and protective distribution optical fibers that connect the RN to the ONU. The ONU transmits and receives optical signals through the operational distribution optical fiber and the operational backbone optical fiber, and, where a failure occurs in the operational distribution optical fiber or the operational backbone optical fiber, the ONU transmits and receives optical signals through the protective distribution optical fiber and the protective backbone optical fiber. | 08-20-2009 |
20090220230 | Passive Optical Network Based On Reflective Semiconductor Optical Amplifier - Provided is a passive optical network (PON) based on a reflective semiconductor optical amplifier (RSOA). In the PON, seed-light-injection RSOAs are used in an optical line terminal (OLT) to achieve the color-less management of the wavelengths of OLT optic sources, and wavelength reuse RSOAs are used to achieve the color-less management of the wavelengths of ONTs. Therefore, problems related to ONT wavelength management can be eliminated by the wavelength reuse RSOAs, and problems related to OLT wavelength management can be eliminated by the seed-light-injection RSOAs. | 09-03-2009 |
20090220231 | Methods and Systems for Delivery of Multiple Passive Optical Network Services - A system for delivering multiple passive optical network services is disclosed. The system includes a first optical transmission service comprising a common wavelength pair routed from a source to each of a plurality of subscribers. The system further includes a second optical transmission service comprising a plurality of unique wavelength pairs, where each of the unique wavelength pairs is routed from the source to a subscriber among the plurality of subscribers. The system delivers the first optical transmission service and the second optical transmission service to the subscriber on a single optical fiber. | 09-03-2009 |
20090274463 | UPGRADE RESILIENT MULTI-TRANSPORT OPTICAL NETWORK TERMINAL - This disclosure is directed to devices and methods for facilitating the upgrade of optical networks. An optical network terminal (ONT) that terminates an optical fiber link of an optical network comprises two or more transport engines that each converts data transmitted via different transports to data corresponding to a service. For example, the ONT may include a first transport engine and a second transport engine. The first transport engine converts data received over the optical network via a first transport, e.g., a legacy transport, into data corresponding to a service for one or more subscriber devices. The second transport engine converts the data received over the optical network via a second transport, e.g., a next generation transport, into the data corresponding to the service for the subscriber devices. The ONT is selectively configurable to select one of the first and second transport engines, thereby making the ONT upgrade-resilient. | 11-05-2009 |
20090304388 | Optical Branching Apparatus and Passive Optical Network System - In the case where, in a WDM-PON system, a high-output optical signal or a pseudo signal for illegal access by a hostile user, or an optical signal with a wavelength which is not assigned from an OLT is input to an ONU-side optical fiber, the quality of communications for other users is possibly affected and a receiver on the station side is possibly destroyed. By providing an optical blocking unit at a position near an ONU-side optical splitter of an optical branching unit, in the case where input of an extraordinary optical signal is detected, an optical route into which the extraordinary optical signal is input is blocked, so that the input of the extraordinary optical signal to an OLT and optical lines shared by plural users can be preliminarily blocked. | 12-10-2009 |
20090324225 | METHOD FOR MAINTAINING THE COMPATIBILITY OF LEGACY OF RECEIVERS, OPTICAL DISTRIBUTING NETWORK STRUCTURE, AND PARTS THEREOF INCLUDING A METHOD FOR USING SUCH PART - The invention relates to a method for maintaining the compatibility of legacy receivers in network termination units of an optical distributing network structure, especially in a passive optical network, when in the distributing network structure advanced receivers with a multiple of the data rate of the legacy receivers shall be operated too, in which signals for the advanced receivers are transmitted on the same wavelength and using the same physical paths as signals for the legacy receivers, in which, while transmitting signals for the advanced receivers at the same time also signals for the legacy receivers are transmitted, and in which the amplitude of the signals for the advanced receivers compared to the amplitude of the signals for the legacy receivers are chosen such that the signals for the advanced receivers do not block the legacy receivers in the receipt of the signals intended for them. | 12-31-2009 |
20100021164 | WDM PON RF/VIDEO BROADCAST OVERLAY - A system for overlaying an analog broadcast channel in a Wavelength Division Multiplexed Passive Optical Network (WDM-PON). A remote node of the WDM PON includes a MUX/DEMUX for demultiplexing a Wavelength Division Multiplexed (WDM) signal and supplying respective wavelength channels to each one of a plurality of channel fibers; an optical power splitter for supplying the analog broadcast channel to each one of a plurality of distribution paths; and a respective optocoupler connected to each distribution path, each opticoupler coupling the analog broadcast channel into one of the channel fibers. The analog broadcast channel has a wavelength that is outside a wavelength band of the WDM signal. An Optical Network Terminal (ONT), which is connected to one of the channel fibers, includes a triplexer for separating the analog broadcast channel from at least a downlink wavelength channel of the WDM-PON. | 01-28-2010 |
20100046946 | WDM PON RF OVERLAY ARCHITECTURE BASED ON QUANTUM DOT MULTI-WAVELENGTH LASER SOURCE - In a Wavelength Division Multiplexed Passive Optical Network (WDM-PON) including, a system for overlaying an analog broadcast signal. An Optical Line Terminal of the WDM-PON includes a broadband light source for generating uplink seed light for each uplink channel of the WDM-PON, and a modulator for modulating the analog broadcast signal onto the uplink seed light. An Optical Network Terminal of the WDM-PON receives the uplink seed light from the Optical Line Terminal, and includes an optical divider for dividing the received seed light into a first signal and a second signal; a light source for generating an uplink data signals using the first signal as seed light; and an RF receiver for detecting the analog broadcast signal modulated on the second signal. | 02-25-2010 |
20100046947 | SYSTEM AND METHOD FOR COMMUNICATING OPTICAL SIGNALS BETWEEN A DATA SERVICE PROVIDER AND SUBSCRIBERS - An optical fiber network can include an outdoor laser transceiver node that can be positioned in close proximity to the subscribers of an optical fiber network. The outdoor laser transceiver node does not require active cooling and heating devices that control the temperature surrounding the laser transceiver node. The laser transceiver node can adjust a subscriber's bandwidth on a subscription basis or on an as-needed basis. The laser transceiver node can also offer data bandwidth to the subscriber in preassigned increments. Additionally, the laser transceiver node lends itself to efficient upgrading that can be performed entirely on the network side. The laser transceiver node can also provide high speed symmetrical data transmission. Further, the laser transceiver node can utilize off-the-shelf hardware to generate optical signals such as Fabry-Perot (F-P) laser transmitters, distributed feed back lasers (DFB), or vertical cavity surface emitting lasers (VCSELs). | 02-25-2010 |
20100142954 | STANDBY BROADBAND LIGHT SOURCE FOR PASSIVE OPTICAL NETWORKS - Techniques are disclosed for a broadband service provider to maintain continuity of service in the event that a broadband light source fails in a passive optical network which uses injection-locked transmitters. Generally, a first broadband light source is connected to a passive optical network. Should the first broadband light source fails, it is disconnected from the network, and a second broadband light source is connected to the network. | 06-10-2010 |
20100142955 | Optical line terminal, passive optical network and radio frequency signal transmission method - An optical line terminal, a passive optical network and a radio frequency signal transmission method in the communication technical field are provided. The passive optical network comprises: an OLT, an ODN and at least one ONU. The OLT comprises: at least one transmitting unit, which provides one dedicated downstream optical carrier and two dedicated upstream optical carriers for ONU; the two dedicated optical carriers for ONU are configured to carry ONU upstream radio frequency signals; a multiplexing/demultiplexing unit; and at least one receiving unit which obtains the upstream signal from the demultiplexed upstream optical signal. The bandwidth of wireless access network is enhanced, and the design of ONU is simple. | 06-10-2010 |
20100183306 | Method and system for communicating information between a point of distribution and a plurality of subscriber destinations via a hybrid fiber coax delivery plant - A communication system for distributing information via a network to one or more subscribers includes a multi-port switch, one or more radio frequency (RF) modems coupled to respective ports of the switch, a combiner and a transmitter. The switch forwards source information to the RF modems based on address information. Each RF modem modulates and up converts information from the switch to an RF signal within a respective subscriber channel of the television broadcast spectrum. Each channel is assigned to one or more subscribers, and each subscriber is allocated unshared bandwidth. Each channel may be further divided into unshared bandwidth increments, so that multiple subscribers may share a single channel. The combiner combines modulated information from each RF modem into a combined signal and the transmitter transmits the combined signal to the subscribers via the network. An HFC network including a distribution point and one or more optical nodes is contemplated, each optical node serving a particular geographic area via a corresponding coaxial cable. Each subscriber destination includes a gateway device or the like that is tuned to a corresponding channel to retrieve source information from that channel, and to deliver the information to one or more local subscriber devices. The gateway further includes converters, a modulator and an up converter to receive and transmit subscriber information upstream to the distribution point. The gateways and an address resolution server enforce point to point communications. A bandwidth manager allocates bandwidth and monitors bandwidth usage. | 07-22-2010 |
20100196010 | OPTICAL TRANSMISSION SYSTEM - An optical transmission system is provided. The optical transmission system includes a user side optical repeater device, a central office side optical repeater device, and wavelength multiplexing and wavelength de-multiplexing functions. The user side optical repeater device is to be connected with a user side optical network unit, transmits data in two ways, and is used for wavelength division multiplexing. The central office side optical repeater device is to be connected with a central office side optical line terminal, transmits data in two ways, and is used for wavelength division multiplexing. The wavelength multiplexing and wavelength de-multiplexing functions are used for relaying between the user side optical repeater device and the central office side optical repeater device. | 08-05-2010 |
20100221008 | Wavelength-Division Multiplexed Passive Optical Network for Reducing Degradation in Noise Characteristic of Wavelength-Locked Fabry-Perot Laser Diodes - The present invention relates to a wavelength-division multiplexed passive optical network (WDM-PON) for reducing degradation in noise characteristic of a wavelength-locked Fabry-Perot Laser Diode (F-P LD). A WDM-PON for reducing degradation in a noise characteristic of a wavelength-locked F-P LD in accordance with the present invention comprises a central office (CO); a remote node (RN) being connected to the CO by a single mode fiber; and one or more optical network terminations (ONTs) being connected to the RN by one or more single mode fibers, respectively, wherein the CO comprises: a broadband light source (BLS) for generating light to be injected; a first wavelength-division multiplexing (WDM) filter for filtering for the injected light generated from the BLS and having a bandwidth wider than a bandwidth of the injected light in order to minimize a filtering effect; and one or more optical transceiver having one or more F-P LDs into which light being filtered by the first WDM filter is injected; and wherein the RN filters the injected light generated from the BLS and injects the filtered light into the one or more ONTs; and wherein the RN comprises a second WDM filter having a bandwidth wider than a bandwidth of the injected light in order to minimize a filtering effect. | 09-02-2010 |
20100226649 | Multi-Fiber Ten Gigabit Passive Optical network Optical Line Terminal for Optical Distribution Network Coexistence with Gigabit Passive Optical Network - An apparatus comprising a wavelength division multiplexing (WDM) coupler configured to couple an optical line terminal (OLT) comprising a transmitter and a receiver, wherein the WDM coupler is coupled to the transmitter via a first fiber and to the receiver via a second fiber. An apparatus comprising a WDM coupler for a passive optical network (PON) comprising a plurality of filters and a plurality of ports, wherein the WDM coupler comprises fewer filters than ports. A method comprising receiving a downstream optical signal intended for an optical network terminal (ONT) via a first fiber, and transmitting an upstream optical signal received from the ONT via a second fiber. | 09-09-2010 |
20100266284 | Method and Apparatus Using Distributed Raman Amplification and Remote Pumping In Bidirectional Optical Communication Networks - A bidirectional optical communications network comprises an optical transmission fiber for carrying a downstream signal at a first wavelength and a multiplicity of upstream signals at a second, different wavelength. The fiber is characterized by distributed Raman gain over at least an extended portion of its length. A first terminal, optically coupled to one end of the fiber, includes a first transmitter for generating the downstream signal, a first receiver for detecting the upstream signals, and at least one pump source for generating pump light that provides Raman amplification to either the downstream signal or the upstream signal or both. A multiplicity of second terminals, optically coupled to another end of the fiber, each includes a second transmitter for generating one of the upstream signals, and a second receiver for detecting a downstream sub-signal. A passive optical node is configured to (i) split the downstream signal into a multiplicity of downstream sub-signals each propagating at the first wavelength to a separate one of the second terminals and (ii) to combine each of the upstream signals from each of the second terminals onto the fiber for transmission to the first terminal. In another embodiment, the network is a GPON compatible with current ITU standards. | 10-21-2010 |
20100278535 | WAVELENGTH DIVISION MULTIPLEXING-PASSIVE OPTICAL NETWORK USING EXTERNAL SEED LIGHT SOURCE - Provided are a wavelength division multiplexing-passive optical network (WDM-PON) in which a reflective semi-conductor optical amplifier (RSOA) is used as each optical transmitter of an optical line termination (OLT) and an optical network unit (ONU) and additional spectrum-sliced light is injected into RSOAs of each of the OLT and the ONU, and a WDM-PON that is combined with time division multiple access (TDMA) technology, by which the number of included ONUs increases and conventional TDMA ONUs can be used. | 11-04-2010 |
20100296811 | OPTICAL ACCESS SYSTEM - There are provided multiple candidates for FEC codes selectable for each of the ONTs. An OLT is provided with: means for storing redundancy and a code length of each FEC code in a table; means for selecting an FEC code; means for encoding or decoding data using the selected FEC code; means for calculating a bandwidth in consideration for the FEC redundancy and the code length with reference to the table during band assignment calculation; and means for notifying the destination ONT of the selected FEC code. | 11-25-2010 |
20110038632 | Method, Apparatus, and System for Extending Passive Optical Network - A PON extender includes an optical amplifier that is adapted to compensate optical power for PON signals in a downlink channel. An optical control switch is connected with an ONU and is adapted to extract overhead information of the PON signals in the downlink channel and to select one channel of ONU uplink signals as output uplink channel PON signals according to the extracted overhead information. A regenerating device is adapted to regenerate optical signals for the uplink channel PON signals output under control of the optical control switch. | 02-17-2011 |
20110135307 | Fiber Optic Terminals, Systems, and Methods for Network Service Management - Fiber optic terminals, systems, and methods for providing differentiated network services to subscribers of a fiber optic network are disclosed. In certain embodiments, fiber optic terminals and methods are disclosed for providing more than one network service to subscribers supported by the same fiber optic terminal. In one embodiment, a fiber optic terminal is provided comprising a first optical path connected to a first network-side optical fiber providing a first network service to a first subscriber-side optical fiber. The fiber optic terminal also comprises a second optical path connected to a second network-side optical fiber providing a second network service differentiated from the first network service to a second subscriber-side optical fiber. In this manner, differentiated network services can be provided to subscribers supported by the fiber optic terminal by configuring connections of the subscribers to either the first optical path or second optical path in the fiber optic terminal. | 06-09-2011 |
20120033973 | Methods And Systems For Increasing Reach And/Or Split In Passive Optical Networks - Systems and methods according to these exemplary embodiments provide for methods and systems that allow for either reducing signal loss or improving the optical signal strength in a PON for increasing optical signal range. | 02-09-2012 |
20120128360 | OPEN OPTICAL ACCESS NETWORK SYSTEM - The present invention relates to an open optical access network system in which one optical access network is open to enable a plurality of service providers and a plurality of subscribers to simultaneously use the optical access network, to thereby improve the efficiency of using the optical access network, wherein each subscriber can be provided with a plurality of different services from the plurality of service providers, thereby enabling the flexible selection of services and the flexible change in services, thus improving the efficiency of using an optical infrastructure. | 05-24-2012 |
20120177373 | COMMUNICATION SYSTEM AND METHOD FOR DIRECTLY TRANSMITTING SIGNALS BETWEEN NODES OF A COMMUNICATION SYSTEM - A communication system has a plurality of nodes adapted to provide for a communication with one or more devices, a central node, a passive optical network having a multiplexer/demultiplexer device adapted to demultiplex a first optical signal from the central node to the plurality of nodes, and to multiplex second optical signals from one or more of the nodes, each node having allocated a wavelength for generating its optical signal, wherein for directly transmitting signals from one node to at least one of the other nodes, the one node is adapted to generate an optical signal at the wavelength allocated to the at least one of the other nodes, the optical signal including the signal to be transmitted, and wherein the multiplexer/demultiplexer device of the passive optical network is adapted to combine the optical signal from the one node with the first optical signal. | 07-12-2012 |
20120213519 | TRANSMISSION DEVICE OF A LOW-NOISE OPTICAL SIGNAL HAVING A LOW-NOISE MULTI-WAVELENGTH LIGHT SOURCE, A TRANSMISSION DEVICE OF BROADCAST SIGNALS USING A LOW-NOISE MULTI-WAVELENGTH LIGHT SOURCE, AND AN OPTICAL ACCESS NETWORK HAVING THE SAME - The present invention discloses a transmission device of a low-noise optical signal having a low-noise multi-wavelength light source, a transmission device of broadcast signals using a low-noise multi-wavelength light source, and an optical access network having the same. | 08-23-2012 |
20120251115 | POWER SUPPLY CONTROL METHOD, AN OPTICAL NETWORK UNIT, AN OPTICAL LINE TERMINAL AND A COMMUNICATION SYSTEM - In an optical communication system that communicates between an optical line terminal (OLT) and a plurality of optical network units (ONU), an ONU can decide an operation time period of communicating with the OLT and an idle time period of reduced or suspended communication with the OLT by using a timer. The OLT can decide a software renewal time period based on the operation time period and the idle time period. Accordingly, the ONU can supply electrical power to its own communication circuit during the operation time period or the software renewal time period, or cut off or reduce the electrical power if a present time does not occur in either the operation time period or the software renewal time period. | 10-04-2012 |
20120263470 | METHOD FOR PROCESSING TRAFFIC IN AN OPTICAL NETWORK AND OPTICAL NETWORK COMPONENT - A method for processing traffic in an optical network. The optical network includes a transport network with a first fiber and a second fiber, wherein traffic over the first and second fibers is conveyed in opposite directions. A first traffic is branched off from the first fiber towards an optical entity and the first traffic is processed at the optical entity. A second traffic is fed from the optical entity onto the second fiber. There is also described a corresponding optical network. | 10-18-2012 |
20120269515 | 1 TB/S CONVERGED OPTICAL METRO-ACCESS TRANSMISSION BASED ON WAVELENGTH DIVISION MULTIPLEXED ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS PASSIVE OPTICAL NETWORK (WDM-OFDMA-PON) - A Wavelength Division Multiplexed Orthogonal Frequency Division Multiple Access Passive Optical Network (WDM-OFDMA-PON) includes a passive last-mile optical split terminated by optical network units (ONUs) with OFDMA transceivers; a standard single mode fiber (SSMF) link; a central office optical line terminal (CO-OLT) coupled to SSMF link and the passive last-mile optical split, wherein the CO-OLT comprises an OFDMA transceiver, burst-mode-free operation, inline optical dispersion compensation free operation, and WDM-enabled operation. | 10-25-2012 |
20120269516 | OPTICAL TRANSCEIVER APPARATUS AND WAVELENGTH DIVISION MULTIPLEXING PASSIVE OPTICAL NETWORK SYSTEM - An optical transceiver apparatus includes a gain medium, a photoelectric converter, at least one AWG, and a partial reflection mirror. The at least one AWG includes two common ports and multiple branch ports. One of the two common ports functions as a signal sending port, and the other functions as a signal receiving port, where bandwidth of the signal sending port is less than that of the signal receiving port. The gain medium and the photoelectric converter are connected to one of the branch ports of the AWG. The AWG and the partial reflection mirror are configured to cooperatively perform wavelength self-injection locking on an optical signal provided by the gain medium, and output the optical signal through the signal sending port. The AWG is further configured to demultiplex an optical signal received by the signal receiving port to a branch port. A WDM-PON system is also provided. | 10-25-2012 |
20120275793 | LASER DIODE, METHOD FOR MANUFACTURING LASER DIODE AND PASSIVE OPTICAL NETWORK SYSTEM - Embodiments of the present disclosure provide a laser diode. The laser diode includes: a semiconductor substrate, a waveguide layer and a light wave limiting layer. The waveguide layer is disposed on the semiconductor substrate, and comprises a quantum well layer. The light wave limiting layer is disposed on a surface of the waveguide layer, and is configured to limit a light wave to be transmitted in the waveguide layer. The quantum well layer includes a plurality of quantum well regions that are disposed along a transmission direction of the light wave, and the quantum well regions respectively have gain peaks of different wavelengths. The embodiments of the present disclosure further provide a manufacturing method of a laser diode and a passive optical network system using the laser diode. | 11-01-2012 |
20120315047 | METHOD AND APPARATUS FOR ENABLING MULTIPLE OPTICAL LINE TERMINATION DEVICES TO SHARE A FEEDER FIBER - A method and apparatus for enabling multiple optical line termination (OLT) devices to share a feeder fiber are disclosed. For example, the optical network comprises a plurality of optical line termination (OLT) devices, where each OLT device having a transceiver for sending and receiving optical signals. The optical network further comprises a wave division multiplexer (WDM) combiner, coupled to the plurality of OLT devices, for combining optical signals received from the plurality of OLT devices. The optical network further comprises an optical extender box comprising at least one hybrid SOA-Raman amplifier, wherein the optical extender box is coupled to the WDM combiner via a first standard single mode fiber section. Finally, the optical network further comprises at least one optical splitter coupled to the optical extender box via a second standard single mode fiber section. | 12-13-2012 |
20120321317 | Long-Distance Box and Method for Processing Uplink and Downlink Lights Thereof - The disclosure provides a long-distance box and a method for processing uplink/downlink light thereof. The method includes that: the uplink/downlink light (uplink light and downlink light) from different PON systems is split, and the uplink/downlink light from different PON systems is transmitted through different optical paths; and the uplink/downlink light from different PON systems is processed by long-distance boxes belonging to corresponding systems in different optical paths, and then output to the OLTs/ONUs of respective systems. By means of the method provided in the disclosure, a simple and reliable solution is provided for operators to solve the long-distance problem caused by the coexistence of multiple PON systems; furthermore, in the disclosure, modification for the system is slightest, reliability of the system is highest, and an efficiency of the system is highest, so that time and cost are saved for the operators. | 12-20-2012 |
20130004172 | Optical Line Terminal and Optical Network System - Technology to provide linked control of bandwidth allocation to a plurality of optical network units among the plural wavelengths by a bandwidth allocation section coupled to the plural optical network units. | 01-03-2013 |
20130016973 | WAVELENGTH-SELECTABLE LASER DEVICE PROVIDING SPATIALLY-SELECTABLE WAVELENGTH(S) - A wavelength-selectable laser device providing spatially-selectable wavelength(s) may be used to select one or more wavelengths for lasing in a tunable transmitter or transceiver, for example, in a wavelength division multiplexed (WDM) optical system such as a WDM passive optical network (PON). The wavelength-selectable laser device uses a dispersive optical element, such as a diffraction grating, to disperse light emitted from a laser emitter and to direct different wavelengths of the light toward a reflector at different spatial positions such that the wavelengths may be selected by allowing light to be reflected from selected spatial position(s) back into the laser emitter. Thus, the reflected light with a wavelength at the selected spatial position(s) is allowed to complete the laser cavity. | 01-17-2013 |
20130016974 | WAVELENGTH-SELECTABLE LASER DEVICE AND APPARATUS AND SYSTEM INCLUDING SAME - A wavelength-selectable laser device generally includes an array of laser emitters and a filtered external cavity for filtering light emitted from the laser emitters and reflecting different wavelengths back to each of the laser emitters such that lasing occurs at different wavelengths for each of the laser emitters. Each laser emitter includes a gain region that emits light across a plurality of wavelengths including, for example, channel wavelengths in an optical communication system. The filtered external cavity may include a dispersive optical element that receives the light from each of the laser emitters at different angles and passes or reflects different wavelengths of the light at different angles such that only wavelengths associated with the respective laser emitters are reflected back to the respective laser emitters. By selectively emitting light from one or more of the laser emitters, one or more channel wavelengths may be selected for lasing and transmission. | 01-17-2013 |
20130034356 | Rogue Optical Network Unit Mitigation in Multiple-Wavelength Passive Optical Networks - A method implemented in an optical line terminal (OLT) for reducing adverse effects from a rogue optical network unit (ONU) in a passive optical network (PON), comprising determining with a processor that the rogue ONU is transmitting in violation of pre-specified parameters, and sending at least one message to a plurality of ONUs to change a transmitting wavelength from a first wavelength to a second wavelength. | 02-07-2013 |
20130039660 | OPTICAL TRANSCEIVER THAT MAINTAINS A BEND DIAMETER OF AN INTERNAL OPTICAL FIBER AND METHOD OF ASSEMBLING SAME - An optical transceiver includes an internal optical fiber coupled to optical sub-assemblies in the transceiver and is capable of maintaining a bend diameter of the internal optical fiber above a minimum bend diameter. The optical transceiver thus allows optical fiber to be used within a relatively small space within a housing of the optical transceiver without significant power loss in the optical signal carried on the optical fiber. The optical transceiver may be a small form-factor pluggable (SFP) transceiver used, for example, in an optical line terminal (OLT) and/or optical networking unit (ONU) in a wavelength division multiplexed (WDM) passive optical network (PON). | 02-14-2013 |
20130089331 | OPTICAL LINE TERMINAL IN TIME DIVISION MULTIPLE ACCESS PASSIVE OPTICAL NETWORK AND METHOD FOR PROCESSING OPTICAL SIGNAL THEREOF - Proposed is an efficient method of configuration of a transmitter and a receiver for realizing an optical transmission/reception module apparatus including at least one transmission wavelength and two or more reception wavelengths over a time division multiple access passive optical network or an optical network using multiple transmission/reception wavelengths. Further, proposed is a method of configuration of an apparatus which enables optical alignment and assembly in a single package by using a single lens and three different WDM optical filters for a reception module capable of receiving four wavelengths. | 04-11-2013 |
20130089332 | OPTICAL FIBER-BASED DISTRIBUTED COMMUNICATIONS COMPONENTS, SYSTEMS, AND METHODS EMPLOYING WAVELENGTH DIVISION MULTIPLEXING (WDM) FOR ENHANCED UPGRADABILITY - Optical fiber-based distributed communications components and systems employing wavelength division multiplexing (WDM) for enhanced upgradability. The system comprises a plurality of downlink optical transmitters configured to receive downlink electrical radio frequency (RF) signals from a plurality of RF sources and convert the downlink electrical RF signals into downlink optical RF signals. The system also has a wavelength division multiplexer configured to multiplex downlink optical RF signals into a plurality of downlink wavelengths over a common downlink optical fiber connected to a plurality of remote antenna units (RAUs). In this manner, additional downlink optical fibers are not required to support providing additional RAUs in the system. Wavelength-division de-multiplexing can avoid providing additional uplink optical fibers to distribute uplink signals to RAUs added in the system. | 04-11-2013 |
20130101294 | METHODS AND SYSTEMS FOR SYNCHRONOUS SIGNALING ACROSS MULTIPLE DOWNSTREAM WAVELENGTHS IN A PASSIVE OPTICAL NETWORK | 04-25-2013 |
20130108272 | OPTICAL TRANSMISSION SYSTEM | 05-02-2013 |
20130129355 | OPTICAL WAVELENGTH DIVISION NODE - An optical wavelength division node includes an optical splitter, a plurality of optical circulators, and a colorless light source module. The optical splitter receives and splits a downstream signal light source into a first-path and a second-path signal light source. The optical circulator in a first-order position receives and transmits the first-path signal light source to an optical network unit in a first-order position, and receives a return signal and passes it to a next optical circulator, and finally the optical circulator in a last-order position receives the return signal and transmits it. The colorless light source module receives the second-path signal light source and the return signal transmitted by the optical circulator in a last-order position, and uses the second-path signal light source to modulate the return signal to generate an upstream signal light source to be transmitted to the optical line terminal by the optical splitter. | 05-23-2013 |
20130163991 | SYSTEM FOR PROVIDING WDM-BASED WIRELESS OPTICAL TRANSPORT NETWORK AND METHOD FOR TRANSMITTING WIRELESS OPTICAL SIGNAL USING THE SAME - Disclosed are a system for providing a WDM-based wireless optical transport network and a method for transmitting a wireless optical signal using the same. The system for providing a WDM-based wireless optical transport network, includes: a central office terminal (COT) for bilaterally transmitting wireless optical signals of different unique wavelengths; and a plurality of remote terminals (RTs) connected to the COT in a ring, for dropping a wireless optical signal having a corresponding unique wavelength from the wireless optical signals transmitted from the COT, for adding a corresponding optical transmission signal to wireless optical signals of the remaining unique wavelengths except for the corresponding unique wavelength of the dropped wireless optical signal, and for bilaterally transporting the wireless optical signals to which the corresponding optical transmission signal is added. | 06-27-2013 |
20130183039 | SELECTABLE MULTIPLE-WAVELENGTH ACCESS FOR OPTICAL NETWORK UNITS IN ARRAYED WAVEGUIDE BASED WAVELENGTH DIVISION MULTIPLEXING PASSIVE OPTICAL NETWORK - An optical network unit (ONU) accesses services provided by multiple optical line terminals (OLTs) in a wavelength division multiplexing (WDM) passive optical network (PON). The ONU receives downstream signals from a first plurality of OLTs through a designated port of an arrayed waveguide (AWG). At any given time, the bandpass filter module can select any one of a first plurality of AWG cycles allocated to the first plurality of OLTs. Based on received downstream signals, the ONU transmits upstream signals to a second plurality of OLTs through the designated port of the AWG. At any given time, the bandpass filter module and a transmitter of the ONU can select any one of a second plurality of AWG cycles allocated to the second plurality of OLTs. The ONU may be configured with a plurality of receivers and transmitters, whereby it is enabled to simultaneously subscribe to a plurality of AWG cycles. | 07-18-2013 |
20130209105 | WAVELENGTH-SHIFTED BIDIRECTIONAL WAVELENGTH DIVISION MULTIPLEXING OPTICAL NETWORK - Disclosed is a wavelength-shifted bidirectional WDM optical network including: an optical line terminal including an optical line terminal (OLT) including a first optical transmitter transmitting a downstream WDM optical signal, a first high-density wavelength multiplexer/demultiplexer wavelength-multiplexing the downstream WDM optical signal or wavelength-demultiplexing a wavelength-multiplexed upstream WDM optical signal, and a first optical receiver receiving the wavelength-demultiplexed upstream WDM optical signal; a remote node (RN) including a second high-density wavelength multiplexer/demultiplexer shifting a center wavelength of the upstream WDM optical signal and wavelength-multiplexing the upstream WDM optical signal with the shifted center wavelength or wavelength-demultiplexing the wavelength-multiplexed downstream WDM optical signal; and multiple optical network units (ONUs) each including a second optical transmitter transmitting the upstream WDM optical signal and second optical receiver receiving the wavelength-demultiplexed downstream WDM optical signal. | 08-15-2013 |
20130223841 | TIME/WAVELENGTH-DIVISION MULTIPLEXED PASSIVE OPTICAL NETWORK (TWPON) - The present invention discloses a time/wavelength-division multiplexed passive optical network (TWPON), which has an optical splitter ( | 08-29-2013 |
20130236180 | DISTRIBUTED ANTENNA SYSTEM AND METHOD - A distributed antenna system includes a plurality of remote units configured to service different regions of a service area, and a head-end unit configured to process and transmit downlink signals from base stations to the remote units over optical cables, and to process and transmit uplink signals from the remote units to the base stations, wherein the remote units are configured to adjust or filter a level of downlink signals from the head-end unit and to transmit the adjusted or filtered downlink signals to mobile stations, and to process and transmit uplink signals from mobile stations to the head-end unit over the optical cables. | 09-12-2013 |
20140016938 | TEMPERATURE ADJUSTABLE CHANNEL TRANSMITTER SYSTEM INCLUDING AN INJECTION-LOCKED FABRY-PEROT LASER - A tunable channel transmitter system for a wavelength division multiplexed (WDM) passive optical network (PON) includes a WDM communication system having a plurality of WDM channel bandwidths, an injection-locked Fabry-Perot laser having a plurality of resonant modes, a seed light source to provide seed light to the injection-locked Fabry-Perot laser, and a temperature control element configured to shift the plurality of resonant modes of the injection-locked Fabry-Perot laser to ensure that only one resonant mode of the injection-locked Fabry-Perot laser is locked to the seed source and transmitting a substantial portion of the laser power through a desired channel of the WDM communications system. | 01-16-2014 |
20140072305 | METHOD AND SYSTEM FOR BI-DIRECTIONAL COMMUNICATION OVER A SINGLE OPTICAL FIBER - Gigabit Ethernet connectivity is realized using off-the-shelf GIGABIT INTERFACE CONVERTER transceivers, wave division multiplexer/demultiplexers, and a single optical fiber. Simultaneous and bi-directional optical communication over a single optical fiber connecting two or more nodes is achieved by using at least one GIGABIT INTERFACE CONVERTER transceiver having at least one optical signal output and an optical signal input that are of different wavelengths from each other. | 03-13-2014 |
20140093244 | FILTERED LASER ARRAY ASSEMBLY WITH EXTERNAL OPTICAL MODULATION AND WDM OPTICAL SYSTEM INCLUDING SAME - A filtered laser array assembly generally includes an array of laser emitters coupled between external modulators and an arrayed waveguide grating (AWG). Each of the laser emitters emits light across a plurality of wavelengths including, for example, channel wavelengths in an optical communication system. The AWG filters the emitted light from each of the laser emitters at different channel wavelengths associated with each of the laser emitters. Lasing cavities are formed between each of the laser emitters and a back reflector coupled to an output of the AWG such that laser output from the laser emitters is provided at the respective channel wavelengths of the reflected, filtered light. The external modulators enable high speed modulation of the laser output. The modulated laser output may then be optically multiplexed to produce an aggregate optical signal including multiple channel wavelengths. | 04-03-2014 |
20140140701 | TIME AND WAVELENGTH-SHIFTED DYNAMIC BIDIRECTIONAL SYSTEM - In one embodiment, a bidirectional optical network is disclosed, in which an incoming/downstream modulated optical signal(s) of a particular wavelength may carry content from a headend to a subscriber. An incoming/downstream unmodulated continuous wave optical signal(s) from the headend may be time-shifted (i.e., time delayed with respect to just received incoming/downstream optical signal(s)), collected, modulated and sent back as return/upstream optical signal(s) from the subscriber to the headend. The return/upstream optical signal(s) may have the same wavelength or a slightly shifted wavelength relative to incoming/downstream optical signal(s). In some embodiments, wavelength, bandwidth, subscriber priority and service (content) provider may be fixed, dynamically, or statistically assigned. | 05-22-2014 |
20140161456 | NETWORK SYSTEM, STATION-SIDE APPARATUS, AND METHOD OF CONTROLLING COMMUNICATIONS - An aspect of this invention is a network system including subscriber apparatuses and a station-side apparatus for communicating with the subscriber apparatuses. The station-side apparatus communicates with the subscriber apparatuses using wavelengths. The station-side apparatus determines a wavelength to be used by each of at least one subscriber apparatus of the subscriber apparatuses based on effective transmission rates used by the subscriber apparatuses in communications with the station-side apparatus. | 06-12-2014 |
20140193152 | SIGNAL TRANSMISSION METHOD, SIGNAL RECEIVING METHOD, PASSIVE OPTICAL NETWORK PON DEVICE, AND PON SYSTEM - Embodiments of the present disclosure relate to a signal transmission method The signal receiving method includes: receiving a first transmit signal, where the first transmit signal includes a first polarized optical signal and a second polarized optical signal that are perpendicular to each other, where the first polarized optical signal is loaded with first data, the first transmit signal is an uplink signal, and the first data is uplink data, or, the first transmit signal is a downlink signal, and the first data is downlink data; splitting the first transmit signal into a first signal and a second signal according to power; separately rotating a first polarized optical signal and a second polarized optical signal of the second signal by 90 degrees; and performing coherent mixing on the rotated second signal and the first signal to obtain the first data. | 07-10-2014 |
20140233954 | LINK ESTABLISHMENT METHOD FOR MULTI-WAVELENGTH PASSIVE OPTICAL NETWORK SYSTEM - Provided is a method of establishing a link between service provider equipment and subscriber equipment in a multi-wavelength passive optical network system. The method of establishing a link includes acquiring information about a wavelength plan of allocated wavelengths in the MW PON system; transmitting a first signal wavelength initialization request signal on a first upstream wavelength from physical layer to the service provider equipment; waiting for a response from the service provider equipment for a predetermined time interval after transmitting the first signal wavelength initialization request signal; and in response to failing to receive a response to the first signal-wavelength initialization request signal within the predetermined time interval, transmitting a second signal wavelength initialization request signal on a second upstream wavelength to the service provider equipment after the waiting. | 08-21-2014 |
20140233955 | Passive Optical Network System - A system for providing bi-directional RF services over a point-to-multipoint Passive Optical Network (PON). A system that can transport upstream RF signals generated by devices such as a set top box or a cable modem, through a passive Optical Network while simultaneously supporting downstream RF video and bi-directional base-band services on the PON. | 08-21-2014 |
20140334823 | WAVELENGTH AND BANDWIDTH ALLOCATION METHOD - A wavelength and bandwidth allocation method which includes in order a wavelength determination step S | 11-13-2014 |
20140355989 | SYSTEMS AND METHODS FOR PROVIDING BROADBAND COMMUNICATION - Systems and methods for providing broadband communication are provided. An optical fiber node may be coupled to a source component. The optical fiber node may receive, from the source component, a downstream light signal via at least one input optical fiber, and transmit the downstream light signal to a plurality of output optical fibers. A tap device may be coupled to the optical fiber node via at least on optical fiber. The tap device may receive the downstream light signal via the at least one output optical fiber, convert the downstream light signal into a radio frequency downstream signal, and transmit the radio frequency downstream signal to a plurality of cable lines. The plurality of cable lines may be coupled to one or more customer premises. | 12-04-2014 |
20140369690 | WAVELENGTH-DIVISION MULTIPLEXING (WDM) OPTICAL FIBER NETWORK SYSTEM - A wavelength-division multiplexing (WDM) optical fiber network system is disclosed, which comprises a signal provider generating at least one set of wavelength signals of a plurality of different wavelengths and coupled to a plurality of modulation modules. The modulation modules respectively coupled to a user receiver. The modulation module comprises a control unit generating a random sequence and a control signal corresponding to the random sequence, and transmitting the control signal to a first modulation unit. The control unit is coupled to the signal provider to receive the wavelength signals and controls the first modulation to retrieve a wavelength signal according to the control signal. The control unit rapidly changes the control signal according to the random sequence whereby the first modulation unit rapidly retrieves the wavelength signals of different wavelengths and transmits them to the user receiver, so as to prevent a specific wavelength from attack. | 12-18-2014 |
20150043916 | METHOD AND SYSTEM FOR PROVIDING DEDICATED SERVICE ON A PASSIVE OPTICAL NETWORK - An approach for providing dedicated service in a passive optical network (PON) is described. A dedicated service generates a multi-wavelength optical signal comprising a plurality of sub-signals corresponding to carrier wavelengths, modulate the plurality of sub-signals simultaneously with a content signal and transmit the plurality of sub-signals to one or more respective subscribers over an optical distribution network. | 02-12-2015 |
20150125151 | SYSTEMS AND METHODS FOR EXTENDING OPTICAL NETWORK SERVICES ACROSS NON-OPTICAL CHANNELS - An optical communication system comprises a network interface device (NID) having a media converter coupled to an optical fiber of a passive optical network (PON). The media converter converts optical signals from the PON into electrical signals for communication across at least one non-optical channel, such as a conductive or wireless connection, to customer premises equipment (CPE), such as a residential gateway or other customer premises (CP) device. Rather than implementing an optical media access control (optical MAC) layer in the NID, an optical MAC layer for handling PON protocols and management is implemented by the CPE, thereby effectively extending the customer end of the PON across at least one non-optical connection to the CPE. By implementing the optical MAC layer at the CPE, the complexity of the NID is reduced thereby lowering the cost of the NID. In one embodiment, in an effort to further reduce the complexity of the NID, the optical MAC layer is configured to control a laser-on state of an optical transmitter in the NID. | 05-07-2015 |
20150304033 | Power Control in Bidirectional WDM Optical Link - A bidirectional WDM optical communications link has WDM signals sent in opposite directions along a shared optical path and using at least one common wavelength. An optical amplifier ( | 10-22-2015 |
20150304038 | ACTIVE OPTICAL COMBINER FOR CATV NETWORK - An active optical combiner for a CATV network. | 10-22-2015 |
20150304040 | SYSTEMS AND METHODS FOR OPTICAL MODULATION INDEX CALIBRATION IN A CATV NETWORK - Systems and methods for optical modulation index calibration in a CATV network. | 10-22-2015 |
20150304041 | SYSTEMS AND METHODS FOR BURST DETECTION IN A CATV NETWORK - Systems and methods for detecting laser transmission bursts in a CATV network. | 10-22-2015 |
20150318929 | Rogue Optical Network Unit Mitigation in Passive Optical Networks - An optical line terminal (OLT) comprises a target OLT channel termination (CT), and a source OLT CT in communication with the target OLT CT, wherein the source OLT CT is configured to exchange tuning messages with the target OLT CT to initiate upstream wavelength tuning of an optical network unit (ONU), wherein the source OLT CT is configured to transmit a tuning request to the ONU after the tuning messages have been exchanged and to receive a tuning acknowledgement message from the ONU indicating that the tuning request will be executed, wherein the source OLT CT is configured to transmit a broadcast notification message to all OLT CTs within the OLT, except for the source OLT CT, after receipt of the tuning acknowledge message from the ONU, and wherein the broadcast notification message includes a tuning time of the ONU. | 11-05-2015 |
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