Class / Patent application number | Description | Number of patent applications / Date published |
398162000 | Including feedback from receiver | 8 |
20080279566 | METHODS AND APPARATUSES FOR MEASURING JITTER IN A TRANSCEIVER MODULE - Methods and apparatuses are provided for performing jitter measurements in a transceiver module. Accordingly, there is no need to use expensive test equipment that must be inserted into and removed from the network in order to obtain these measurements. In addition, because the measurements can be obtained at any time without any interruption in communications over the network, jitter performance can be monitored more closely and more frequently to facilitate better and earlier diagnosis of problems that can lead to failures in the network. | 11-13-2008 |
20100054754 | BI-DIRECTIONAL SIGNAL TRANSMISSION SYSTEM USING A DUAL-PURPOSE PIN - A signal transmission system in accordance with the invention is implemented using a dual-purpose pin of an optical sub-assembly. The dual-purpose pin is used to propagate an analog signal out of the optical sub-assembly and also for providing an access point where an external element may be coupled to the optical sub-assembly for modulating the analog signal. The optical sub-assembly houses a photodetector, a signal transmitter circuit, and a signal receiver circuit. The photodetector receives light and generates a corresponding electrical signal indicative of the light intensity. The signal transmitter circuit converts the electrical signal received from the photodetector into the analog signal that is transmitted out of the dual-purpose pin. The signal receiver circuit located inside the optical sub-assembly is configured to monitor the modulated analog signal from the dual-purpose pin and generate therefrom, a control signal inside the optical sub-assembly. | 03-04-2010 |
20110135315 | OPTICAL RECEIVER WITH A CALIBRATION MODE - An optical receiver is described. This optical receiver includes a digital feedback circuit that biases a front-end circuit, which receives an optical signal, so that an analog electrical signal output by the front-end circuit is calibrated relative to a reference voltage corresponding to a decision threshold of a digital slicer in the optical receiver. In particular, during a calibration mode the feedback circuit may determine and store a calibration value that calibrates the analog electrical signal relative to the reference voltage. Then, during a normal operating mode, the feedback circuit may output a current corresponding to the stored calibration value that specifies a bias point of the front-end circuit. | 06-09-2011 |
20110188866 | COHERENT OPTICAL COMMUNICATION DEVICE AND METHOD - A coherent optical communication device includes a demodulator configured to demodulate a reception signal; a local oscillator light optical source configured to generate local oscillator light used for demodulating the reception signal; a memory configured to store wavelength information; and a controller configured to control the local oscillator light optical source when the demodulator cannot receive the reception signal, so that a wavelength of the local oscillator light generated in the local oscillator light optical source is changed to a wavelength specified by the wavelength information stored in the memory. | 08-04-2011 |
20140016944 | METHOD, DEVICE, AND SYSTEM FOR SAVING ENERGY IN OPTICAL COMMUNICATION - Embodiments of the present invention disclose a method, a device, and a system for saving energy in optical communication. The method includes the following: sending first information to an optical communication device at a peer end through the optical module by using a first transmit optical power; receiving, through the optical module, second information that is returned by the optical communication device at the peer end after it receives the first information; and reducing, according to the first transmit optical power, and a receive optical power value and minimum receive optical power value in the received second information, the transmit optical power value of the optical module of the optical communication device to a difference value between the first transmit optical power value and the receive optical power value plus the minimum receive optical power value of the optical communication device at the peer end and a margin value. | 01-16-2014 |
20140369695 | EXERCISE TRAINING SYSTEM - An exercise training system is provided having a system controller and a plurality of stimulant target units connected via a wireless network to the system controller. Each stimulant target unit has a light source providing light to stimulate a user, a proximity sensor providing an output of a distance between the proximity sensor and an object external to the unit, and means for providing feedback to the user to signal that the unit has been actuated by the user. The system controller includes a program for activating the stimulant target units in a sequence. The reaction by the user to the illumination is registered when the user brings a body part or other object to within a selected distance of the proximity sensor, this distance being programmable by the user. | 12-18-2014 |
20150037045 | LASER RECEIVER - The invention relates to a laser system comprising a laser receiver collaborating with a laser emitter. The laser emitter is designed to provide a laser light plane and includes a control unit connected to a communication signal receiver in order to work and compute incoming communication signals from the laser receiver. The laser receiver comprising a communication signal transmitter for communicating with the laser emitter, a linear laser light photo sensor and an acceleration sensor both connected to a circuitry, which is designed to derive a movement of the laser receiver with respect to the detected laser beam of the laser emitter from computing and correlating the signals of the acceleration sensor and the laser light photo sensor. The control unit includes an adjustment unit and adjustment is carried out by the adjustment unit in dependence of the worked and computed incoming communication signals of the laser receiver. | 02-05-2015 |
20150050029 | OPERATING VERTICAL-CAVITY SURFACE-EMITTING LASERS - Methods, systems, and computer-readable media are provided for operating a vertical cavity surface-emitting laser. Operating a vertical-cavity surface-emitting laser can include receiving an optical signal from a transmitter, converting the optical signal to a waveform, generating a read capture window based on the waveform, sampling data at a first position in the read capture window, sampling data at a second position in the read capture window, and sending a signal to the transmitter to increase a power level of the optical signal in response to a difference between the sampled data at the first position and the sampled data at the second position exceeding a threshold. | 02-19-2015 |