Patent application number | Description | Published |
20090129775 | OPTICAL PACKET SWITCHING APPARATUS AND METHODS - An optical packet switch switches optical packets according to bit-rates at which the optical packets are provided. For example, optical packets that are received at similar bit-rates may be routed to a destination at separate time slots over a single channel wavelength, and optical packets that are received at different bit-rates may be routed to the destination over separate channel wavelengths. When optical packets are provided at different bit-rates on a plurality of input paths, optical packets provided at low bit-rates may be compacted before switching to the destination. Alternatively or additionally, the bit-rates of the optical packets may be balanced before switching to the destination. Bandwidth contention among optical packets may be resolved by polarizing optical packets originating from separate input paths in different polarization directions, and merging optical packets having different polarization directions onto a single switched channel wavelength. Compaction of optical packets may alternatively be employed for resolution of bandwidth contention. Related apparatus and methods are also described. | 05-21-2009 |
20090136189 | DEVICES AND METHODS FOR ALL-OPTICAL PROCESSING AND STORAGE - In a preferred embodiment, an integrated optical gate matrix, that includes a set of nonlinear elements and waveguides interconnecting at least some nonlinear elements in the set of nonlinear elements, may be configured to enable optical processing. A first subset of the set of nonlinear elements is preferably configured to function as a set of ON/OFF switches in the “OFF” state to enable a second subset of the set of nonlinear elements to be configured in at least one optical processing configuration. Configuration of the second subset of the set of nonlinear elements may be used for various optical processing operations, such as all-optical 2R or 3R regeneration, wavelength conversion, data format conversion, demultiplexing, clock recovery, logic operations and dispersion compensation. Related apparatus and methods are also described. | 05-28-2009 |
20090154917 | PHOTONIC INTEGRATED CIRCUIT DEVICE AND ELEMENTS THEREOF - A photonic integrated circuit (PIC) device is described. The PIC device includes a set of optical transceivers including optical transmitters and optical receivers, and an embedded optical interconnect mesh operatively associated with the set of optical transceivers and structured to enable at least one of the following network architectures: a star network architecture, a bus/broadcast network architecture, and a ring network architecture. Related apparatus and methods are also described. | 06-18-2009 |
20090252166 | NETWORK ELEMENTS INTERCONNECTION - A method for enabling network elements (NEs) operating at a bit rate R | 10-08-2009 |
20110206056 | METHODS AND APPARATUS FOR ENABLING COMMUNICATION BETWEEN NETWORK ELEMENTS THAT OPERATE AT DIFFERENT BIT RATES - A method for enabling network elements (NEs) operating at a bit rate R | 08-25-2011 |
20120069851 | Methods and apparatus for enabling communication between network elements that operate at different bit rates - An apparatus and method for transmitting electronic data between two networks communicating at different bit rates, where the bit rate of the faster network divided by the bit rate of the slower network is a non-integer. The two networks communicate with each other through a set of lanes each communicating at a bit rate that is a common denominator of the bit rates for the two networks. The lanes communicate with two sets of transceivers, one set of the transceivers communicates with the faster network at the faster bit rate and the other (larger) set of transceivers communicates with the slower network at the slower bit rate. Each transceiver is structured so that the total bit rate of the lanes communicating with that transceiver is equal to the bit rate of the network on which the transceiver operates. | 03-22-2012 |
20120263040 | Methods and apparatus for enabling communication between network elements that operate at different bit rates - An apparatus and method for switching and/or routing electronic data between two networks communicating at different bit rates, where the bit rate of the faster network divided by the bit rate of the slower network is a non-integer. A switching/routing unit interconnects the networks via two set of lanes, one set connected to each network. Each lane communicates at a bit rate that is a common factor of the two bit rates. One set of lanes communicates with a set of transceivers that communicate at the faster bit rate on the faster network. The other set of lanes communicates with a (larger) set of network elements (NEs) that communicate at the slower bit rate on the slower network. Each transceiver and NE is structured so that the total bit rate of the lanes communicating with it is equal to the bit rate of its respective network. | 10-18-2012 |
20130142200 | Methods and apparatus for enabling communication between network elements that operate at different bit rates - An apparatus and method for switching and/or routing electronic data between two networks communicating at different bit rates, where the bit rate of the faster network divided by the bit rate of the slower network is a non-integer. A switching/routing unit interconnects the networks via two set of lanes, one set connected to each network. Each lane communicates at a bit rate that is a common factor of the two bit rates. One set of lanes communicates with a set of transceivers that communicate at the faster bit rate on the faster network. The other set of lanes communicates with a (larger) set of network elements (NEs) that communicate at the slower bit rate on the slower network. Each transceiver and NE is structured so that the total bit rate of the lanes communicating with it is equal to the bit rate of its respective network. | 06-06-2013 |
20140029951 | APPARATUS AND METHODS FOR GENERATING AND RECEIVING OPTICAL SIGNALS AT SUBSTANTIALLY 100Gb/s AND BEYOND - A substantially 400 Gb/s optical transceiver includes a substantially 400 Gb/s optical transmitter which includes a set of four substantially 100 Gb/s tunable optical transmitters, each transmitting a substantially 100 Gb/s optical signal in a wavelength division multiplexed form over four channel wavelengths selected such that the resulting 16 channel wavelengths are different from each other and are suitable for WDM, and an optical transmission interface including a set of four 1:4 wavelength division demultiplexers which are operative to demultiplex the substantially 100 Gb/s optical signals to produce substantially 25 Gb/s optical signals over each of the 16 different channel wavelengths, and a 16:1 wavelength division multiplexer which is operative to multiplex the substantially 25 Gb/s optical signals of the 16 different channel wavelengths to generate a substantially 400 Gb/s optical signal. Other embodiments refer to a substantially 400 Gb/s optical receiver, other optical transceivers that operate at substantially 100 Gb/s and beyond, and related apparatus and methods. | 01-30-2014 |
20140078932 | Methods and apparatus for enabling communication between network elements that operate at different bit rates - A method for enabling network elements (NEs) operating at a bit rate R | 03-20-2014 |
20140186020 | APPARATUS AND METHODS FOR ENABLING RECOVERY FROM FAILURES IN OPTICAL NETWORKS - Apparatus for enabling recovery from failures in up to M working paths of a set of N working paths that are allocated N frequency slots of L different slot widths, where M, N and L are positive integers, N≧L>1, and N>M>1. The apparatus includes a processor and a control plane interface. The processor is operative to allocate protection frequency slots to M protection paths in different manners depending on whether M is greater than L, equal to L or less than L. The control plane interface is operatively associated with the processor and is operative to effect provisioning of the M protection paths for supporting recovery from the failures. Related network, apparatus and methods are also disclosed. | 07-03-2014 |
20150043919 | APPARATUS AND METHODS FOR GENERATING AND RECEIVING OPTICAL SIGNALS AT SUBSTANTIALLY 100Gb/s AND BEYOND - An optical communication technique transmits an optical signal at a higher bit rate using an optical transceiver interface couplable to a set of optical transmitters, each operating at a lower bit rate a plurality of channels, by demultiplexing the optical signals from the transmitters such that some of the resulting optical signals have wavelengths that are specified as center wavelengths by an optical communication standard for the lower bit rate optical transmission and the rest of the resulting optical signals have wavelengths offset from the specified center wavelengths, then multiplexing the resulting optical signals into the higher bit rate optical signal. Related optical communication techniques involve using the reciprocal method to receive the higher bit rate optical signal and to produce multiplexed optical signals at the lower bit rate. | 02-12-2015 |
20150078739 | APPARATUS AND METHODS FOR ENABLING RECOVERY IN OPTICAL NETWORKS - Apparatus for enabling an M:N recovery scheme in an optical network includes a set of N working DSP-enabled optical transceivers/transponders including at least one working DSP-enabled optical transceiver/transponder that uses a first set of transmission parameters and at least one working DSP-enabled optical transceiver/transponder that uses a second set of transmission parameters which is different from the first set of transmission parameters, and a set of M protection DSP-enabled optical transceivers/transponders operable to protect the set of N working DSP-enabled optical transceivers/transponders and including L protection DSP-enabled optical transceivers/transponders, each having a capability of using a set of adjustable transmission parameters enabling it to protect every one of the N working DSP-enabled optical transceivers/transponders, and, when M>L, M−L protection DSP-enabled optical transceivers/transponders, each having a capability of protecting at least one, but not all, of the N working DSP-enabled optical transceivers/transponders. Related network and methods are also disclosed. | 03-19-2015 |
20150270893 | Apparatus and methods for enabling recovery from failures in optical networks - Apparatus for enabling recovery from failures in up to M working paths of a set of N working paths that are allocated N frequency slots of L different slot widths, where M, N and L are positive integers, N≧L>1, and N>M>1. The apparatus includes a processor and a control plane interface. The processor is operative to allocate protection frequency slots to M protection paths in different manners depending on whether M is greater than L, equal to L or less than L. The control plane interface is operatively associated with the processor and is operative to effect provisioning of the M protection paths for supporting recovery from the failures. Related network, apparatus and methods are also disclosed. | 09-24-2015 |