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| Number | Title | Issue Date |
| 8116634 | Adaptive injection current controlled burst mode SOA for long and wide reach high speed PON An apparatus comprising an optical power splitter, an optical delay line coupled to the optical power splitter, an optical amplifier (OA) coupled to the optical delay line, and an adaptive injection current (AIC) controller coupled to the optical power splitter and ... | 02/14/2012 |
| 8081881 | Optical node device, network control device, maintenance-staff device, optical network, and 3R relay implementation node decision method An economical optical network is constituted by effectively using network resources by using the minimum number of, or minimum capacity of 3R repeaters. 3R section information corresponding to topology information on the optical network to which an optical node devi... | 12/20/2011 |
| 8019231 | Optical pattern recognition having reduced sensitivity to wavelength instability In exemplary embodiments, all-optical pattern recognition for an optical input signal is achieved by wavelength-converting the input signal and then passively correlating the wavelength-converted signal based on a specified data pattern. By performing wavelength con... | 09/13/2011 |
| 8009994 | Optical node device, network control device, maintenance-staff device, optical network, and 3R relay implementation node decision method An economical optical network is constituted by effectively using network resources by using the minimum number of, or minimum capacity of 3R repeaters. 3R section information corresponding to topology information on the optical network to which an optical node devi... | 08/30/2011 |
| 7853152 | Signal regeneration device, optical receiver, and signal processing method A signal regeneration device which makes an extracted clock signal highly accurate while maintaining superior receiving sensitivity. To this end, a device of the present invention is configured to have a branch section for branching an input electrical signal which ... | 12/14/2010 |
| 7844185 | Method and apparatus for suppressing optical surge in optical burst switching network Apparatuses and methods are provided which suppress a surge component occurring at an optical amplifier on an optical path through which an optical burst signal is transmitted. An optical amplifier may experience a surge due to the power variation of the optical bur... | 11/30/2010 |
| 7831153 | Optical WDM transmission system having a distributed arrangement of regenerators A network node is provided for use in a WDM optical transmission system that includes a plurality of network nodes interconnected by communication links. The network node includes an optical switch having at least one input port for receiving from the transmission s... | 11/09/2010 |
| 7813650 | Optical system A system and method for controlling the gain of an optical amplifier receiving one or more optical input signal channels at a first end include a source for generating a gain control signal, which is input to the optical amplifier at the opposite end to the input si... | 10/12/2010 |
| 7725040 | Wavelength division multiplexing transmission device In an optical transmission device, when wavelength division multiplexed light formed from signals of a plurality of wavelengths are received, an optical signal of one wavelength comprised in this wavelength division multiplexed light is planarized and non-signal lig... | 05/25/2010 |
| 7711270 | Optical node and optical add/drop multiplexer The optical node connects N networks to each other (where N is an integer larger than one). Each of the N networks respectively includes a first transmission path and a second transmission path. The optical node includes a switching unit that connects the first tran... | 05/04/2010 |
| 7643758 | CWDM system architecture with amplification Methods and apparatus for providing amplification to coarse wave division multiplexing channels or signals are disclosed. According to one aspect of the present invention, an arrangement that adds gain to a set of signals that may be divided into a first band includ... | 01/05/2010 |
| 7627256 | Method and system for wavelength division multiplexed optical signal transmission and optical repeater A wavelength division multiplexed optical signal transmission method, a wavelength division multiplexed optical signal transmission system and an optical repeater enabling the number of wavelengths to be detected without error even when optical noise is caused in th... | 12/01/2009 |
| 7606500 | Scalable transceiver based repeater Systems and methods for repeating optical signals. A scalable transceiver based repeater includes one or more transceivers. Each transceiver includes an optical receiver that receives a channel of an optical signal. The optical transmitter in each transceiver transm... | 10/20/2009 |
| 7590358 | Optical regenerative amplifier for binary phase shift-keying signals There is provided an optical regenerative amplifier for regenerative amplification of a binary phase shift-keying (BPSK) sequence of optical signals having a predetermined time slot between any adjacent signals. The optical regenerative amplifier comprises a first d... | 09/15/2009 |
| 7519299 | Optical signal regenerative repeater, optical gate control method, and optical signal regeneration method An optical signal regenerative repeater is provided including at least one first optical 3R repeater based on an optical communication signal pulse, regenerating the optical communication signal pulse. The first optical 3R repeater comprises a first clock extraction... | 04/14/2009 |
| 7505690 | Multi-channel all-optical signal processor An all-optical processor and method for simultaneous 2R regeneration of the multiple wavelength-division-multiplexed (WDM) channels comprising: a nonlinear medium, wherein the nonlinear medium comprises one or more highly-nonlinear fiber (HNLF) sections adapted to r... | 03/17/2009 |
| 7443574 | Optical transmission system An optical transmission system includes an optical nonlinear element having nonlinear input/output characteristics, a power detector detecting a power of a specific frequency component related to an optical signal reproduced by the optical nonlinear element, and a v... | 10/28/2008 |
| 7440512 | Electrical signal regenerator An electrical signal regenerator including an equalizer and a clock data recovery circuit is provided. The clock data recovery circuit is selected when an input signal of a higher bitrate multiplex level is detected, but the clock data recovery circuit is bypassed w... | 10/21/2008 |
| 7437082 | Private optical communications systems, devices, and methods A method for transmitting traffic in an optical communication system comprising separating the input traffic into a plurality of data signals, parameter encoding the data signals, transmitting each of the data signals on a separate optical channel, receiving the dat... | 10/14/2008 |
| 7437083 | Wavelength converter A wavelength converter for binary optical signals includes an interferometer structure (110) for generating an output signal by modulating a received local signal (LS) according to the modulation of a fUrther received first input signal (IS 1). When su... | 10/14/2008 |
| 7437070 | Submarine observation apparatus and submarine observation system In each of a plurality of submarine observation apparatus (1 to n), a branching unit (63) branches fixed-wavelength light (λ1) from an incoming wavelength-multiplexed light signal. An observation signal modulating unit (64) modulates the... | 10/14/2008 |
| 7423549 | Digital control circuit for serial UART transmissions A digital control circuit enables/disables the feedback of serial transmissions of an UART receive signal when the G-LINK output port is short circuited in a particular operational mode. In a conventional operational mode, the digital control circuit monitors the st... | 09/09/2008 |
| 7424227 | Optical repeater converting wavelength and bit rate between networks An optical repeater which includes a wavelength converter and a bit rate converter. The wavelength converter converts a wavelength of an optical signal from a first optical network to a wavelength of a second optical network. The bit rate converter converts a bit ra... | 09/09/2008 |
| 7421203 | Method for transmitting packet in wireless access network based on wavelength identification code scheme A method for transmitting a packet in a wireless access network based on a wavelength identification code scheme. The method comprises the steps of connecting n number of RNCs (Radio Network Controllers) to one sub-ring where the “n” is a positive integer, and a... | 09/02/2008 |
| 7397847 | Testing device for testing electronic device and testing method thereof A testing device for testing an electronic device is provided. The testing device includes: a deterministic jitter application unit for applying deterministic jitter to a given input signal without causing an amplitude modulation component and supplying the input si... | 07/08/2008 |
| 7391974 | Wavelength division multiplexing optical transmission equipment and method of amplifying optical wavelength division multiplexed signals Optical signal transmission is improved by reducing the variance in light output level and OSNR by adjusting optical signal intensity and gain tilt, taking SRS influence into consideration. ... | 06/24/2008 |
| 7379677 | Method of wavelength conversion and wavelength converter The wavelength converter comprises (1) an optical multiplexer for multiplexing an amplitude-modulated first light and reference light, which is continuous light having a wavelength different from the wavelength of the first light, (2) an optical fiber for propagatin... | 05/27/2008 |
| 7376354 | All optical clock recovery All optical clock recovery includes a transmitter for generating an optical timing signal. The transmitter includes a semiconductor laser for the production of a dynamically synchronizable timing signal, the laser having an external resonator for feedback of the tim... | 05/20/2008 |
| 7375879 | Structure with saturable optical absorbent for device for regenerating optical signals The field of the invention is that of devices for regenerating optical signals. It applies more particularly to systems for high-throughput long distance transmission by optical fibres of digital data. While propagating, optical signals necessarily experience attenu... | 05/20/2008 |
| 7369779 | Regeneration of optical phase modulated signals A regenerator for restoring the originally encoded optical phase of a differential-phase-shift-keyed signal. In an embodiment, the regenerator simultaneously provides limiting amplification and reduces amplitude noise based on a phase-sensitive optical amplifier tha... | 05/06/2008 |
| 7356259 | Optical bypass upgrade configuration Optical bypass node upgrade configurations are disclosed: (1) a configuration where optical taps are pre-positioned in wavelength division multiplex (WDM) line systems terminating at optical-electrical-optical (OEO) core switching nodes to allow for future upgrade o... | 04/08/2008 |
| 7352973 | Adding wavelengths to an optical communication network A method for adding a new wavelength to an optical communication network is provided. One step of the method includes installing a transmitter component in a transmitter node of the optical communication network. Another step includes installing a receiver component... | 04/01/2008 |
| 7340186 | Discrimination phase margin monitor circuit, transmitting/receiving device and communication system The discrimination phase margin monitor circuit (10) of the present invention comprises a first discrimination circuit (11 and 12) discriminating an input data signal using a clock signal extracted from the input data signal, a second discrimina... | 03/04/2008 |
| 7333737 | Optical receiver There is provided an optical receiver in which a time gate can be realized with a simple, low-cost configuration, and which has few aspects that require adjustment. The optical receiver of the present invention comprises a decoding circuit in which optical signals w... | 02/19/2008 |
| 7329251 | Laser treatment apparatus A laser treatment apparatus for performing treatment by irradiating an affected part with a laser beam comprises: a laser source capable of emitting beams of a plurality of different wavelengths; a first setting unit which sets an irradiation amount of a laser beam ... | 02/12/2008 |
| 7330304 | Method and apparatus for PPM demodulation using a semiconductor optical amplifier An optical pulse position modulation receiver relying on the gain dynamics in a semiconductor optical amplifier (SOA). Optical PPM signal pulses and periodic optical clock pulses at a different frequency and/or polarization than the signal pulses are coupled into an... | 02/12/2008 |
| 7327960 | Receiver transponder for protected networks A receiver transponder to be used in an optical add and drop multiplexer connected in short haul type networks receives light signals from two opposite directions on input fibers (21, 23). The optical input signals are converted to electrical signals by O/E c... | 02/05/2008 |
| 7321729 | Optical ring network with selective signal regeneration and wavelength conversion An optical network includes an optical ring having a plurality of subnets. The subnets each include one or more add/drop nodes that are coupled to the optical ring and that passively add and drop traffic to and from the optical ring in one or more wavelengths. The o... | 01/22/2008 |
| 7310482 | Optical wavelength conversion for phase-modulated optical signals An optical communication system comprises a first optical interface, an optical processing system, and a second optical interface. The first optical interface receives an optical signal that is phase-modulated and has a first wavelength. The optical processing syste... | 12/18/2007 |
| 7295783 | Digital optical network architecture A digital optical network (DON) is a new approach to low-cost, more compact optical transmitter modules and optical receiver modules for deployment in optical transport networks (OTNs). One important aspect of a digital optical network is the incorporation in these ... | 11/13/2007 |
