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| Number | Title | Issue Date |
| 8270845 | Multimode fiber tap for a LRM connection A device for processing data being optically transmitted via a LRM connection includes an optical splitter for splitting an input signal into a first output signal and a second output signal, the optical splitter having an operating wavelength with a value that is b... | 09/18/2012 |
| 8233807 | Optical pulse amplication apparatus and method A method and apparatus for producing a series of amplified optical pulses from a series of input optical pulses. The method includes creating a set of local optical pulses from a series of input optical pulses, the set of local optical pulses being applied to the in... | 07/31/2012 |
| 7787777 | Optical packet network system An optical packet network system of a ring type, capable of preventing degradation of an optical signal, can be implemented by providing a mechanism relatively simple in structure, capable of erasing light noise if the optical packet signal does not exists. In the o... | 08/31/2010 |
| 7483639 | Method and system for transmitting information in an optical communication system using distributed amplification A method and system for transmitting information in an optical communication system includes modulating a non-intensity characteristic of an optical carrier signal with a data signal to generate an optical information signal. The optical information signal is transm... | 01/27/2009 |
| 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 |
| 7394990 | All optical wavelength converter An optical wavelength converter receives an input optical signal, and in response, generates an output optical signal having a wavelength that is different from the wavelength of the received input signal. An optical amplifier amplifies the received input signal and... | 07/01/2008 |
| 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 |
| 7366271 | Clock and data recovery device coping with variable data rates A clock and data recovery (CDR) device is disclosed that is capable of recovering a clock signal from a data signal that has a variable data rate. The CDR device includes a reference clock generating section for dividing a basic clock by a first predetermined value ... | 04/29/2008 |
| 7356213 | Transparent switch using optical and electrical proximity communication Embodiments of a switch are described. This switch includes input ports configured to receive signals (which include data) and output ports configured to output the signals. In addition, the switch includes switching elements and a flow-control mechanism, which is c... | 04/08/2008 |
| 7340177 | WDM optical communication system capable of monitoring temperature A device and method to monitor and temperature compensate change in wavelength within a WDM optical communication system is disclosed. The device includes a laser diode for generating an optical signal for temperature monitoring, a first fiber Fabry-Perot interferom... | 03/04/2008 |
| 7327958 | Transient-based channel growth for optical transmission systems A channel-growth plan for an optical transmission system selects channels such that the transients that result in the channels that survive a network failure, such as an upstream fiber cut, are either minimized or effectively handled by some transient-control techni... | 02/05/2008 |
| 7280766 | Method and device for processing an optical signal The present invention is a method of processing an optical signal, including the steps of (a) inputting signal light into a first nonlinear optical medium to broaden the spectrum of the signal light through self phase modulation occurring in the first nonlinear opti... | 10/09/2007 |
| 7263296 | Optical transmission system using in-line amplifiers In a system connecting a transmitter and a receiver using transmission paths and repeaters (in-line amplifiers), red chirping whose α parameter is performed for an optical signal on a transmitting side. Each of the repeaters includes a dispersion-compensator for co... | 08/28/2007 |
| 7254338 | Multi-wavelength light source A multi-wavelength light source unit for optical communication system is disclosed. The light source includes a demultiplexer for demultiplexing a multiplexed light signal into a plurality of lights having different wavelengths and a multiplexer that receives the de... | 08/07/2007 |
| 7248804 | Optical transmission device using a wide input dynamic range optical amplifier Conventionally, an adjustment of an optical power level of an input Pin of an optical amplifier module is made with an optical variable attenuator. An optical coupler for measuring the optical power level of Pin and an optical variable attenuator are replaced by a v... | 07/24/2007 |
| 7242870 | Wavelength division multiplexing system A wavelength division multiplexing system includes a wavelength division multiplexing transmission path including a multimode optical fiber that is codoped with germanium and fluorine. The wavelength division multiplexing system may further include a multiplexer and... | 07/10/2007 |
| 7224517 | Multi-wavelength light amplifier A multi-wavelength light amplifier includes a first-stage light amplifier which has a first light amplifying optical fiber amplifying a light input, a second-stage light amplifier which has a second light amplifying optical fiber amplifying a first light output from... | 05/29/2007 |
| 7203427 | Redundant path all-optical regeneration, reshaping and wavelength conversion for enhanced yield A system, method and device for AO2R is presented. The AO2R system presented is redundant, containing multiple pathways for the input and output signals to travel. The system carries out both the regeneration and reshaping functions in the optical domain, and return... | 04/10/2007 |
| 7200344 | Receiver and method for a multichannel optical communication system A method and system for transmitting information in a wavelength division multiplex (WDM) or other suitable multichannel optical communication system includes receiving a multichannel signal having a symbol rate and comprising a plurality of non-intensity modulated ... | 04/03/2007 |
| 7197247 | WDM optical communication system The present invention provides a WDM optical communication system, comprising input means and output means for an optical signal, an optical fibre path connecting signal-transmissively said input and output means, wherein the optical signal is amplified by means of ... | 03/27/2007 |
| 7196840 | Amplitude balancing for multilevel signal transmission Arrangements are provided for an amplitude balanced optical amplifier. A combination of an optical preamplifier and a gain/loss variation modification device (VMD) is employed. The gain/loss VMD compensates the gain variation across different wavelength channels int... | 03/27/2007 |
| 7181137 | Subband spectrum analysis for optical multiplex section protection The spectrum of a received WDM band or subband is analyzed to detect failure of, e.g., fiber or amplifiers along a line. In one implementation, measurements are taken within the optical spectrum at locations of expected data-carrying optical signals and at two locat... | 02/20/2007 |
| 7173756 | Optical amplification system for variable span length WDM optical communication systems An optical communications system includes a plurality of optical fiber spans. An optical loss of one of the plurality of optical fiber spans is different from an optical loss of another one of the plurality of optical fiber spans. At least one of the plurality of op... | 02/06/2007 |
| 7158725 | Saturable light absorber structure and a device incorporating the structure for regenerating a wavelength division multiplexed signal The invention relates to a saturable light absorber adapted to receive different focused spectral components, wherein the structure of said saturable light absorber comprises microcavities integrated into a substrate and each associated with a respective one of said... | 01/02/2007 |
| 7149431 | Self-seeded Fabry-Perot laser device for wavelength division multiplexing system Disclosed is a Fabry-Perot laser device connected with an optical transmission link. The device comprises an optical circulator for forming an optical waveguide loop and circulating light through the optical waveguide loop and for outputting light from the optical w... | 12/12/2006 |
| 7149433 | Upgrade of optical amplifier site to a digital optical network site in an optical transmission network A digital signal channel bypass is provided as bypass around an optical network optical amplifier, in particular, an analog type optical amplifier, such as an EDFA, in an optical transport network or system. The digital signal bypass provides for an ability to maint... | 12/12/2006 |
| 7139487 | Light burst transmission/reception control system, parent station device used in the same, child station device, and light burst transmission/reception control method A host station apparatus (10) generates band allocation information including identifications of slave station apparatuses (20-1 through 200-n) and types of data to be transmitted by the slave station apparatuses and posts the information... | 11/21/2006 |
| 7136586 | Optical communication system The invention provides an optical communication system (10) comprising a plurality of mutually interconnected bi-directional optical waveguide rings (20, 30, 40, 50, 60) in which radiation modulated with communication traffic propagates. The radiation ... | 11/14/2006 |
| 7136596 | Optical pulse addition device SC light is generated from the input signal 2, of an OTDM signal light 1 with wavelength λs1 and an input signal 2 with wavelength λs2 using an optical fiber and the like, and the wavelength of the SC light is converted i... | 11/14/2006 |
| 7120362 | High power repeaters for Raman amplified, wave division multiplexed optical communication systems High power repeaters for use in amplifying optical data signals transmitted through undersea fiber optic cables are disclosed. Raman amplification schemes using 100 or more pump lasers are integrated into industry standard sized pressure vessels for amplifying optic... | 10/10/2006 |
| 7113707 | Dynamic optical interconnect This invention provides a dynamic interconnection system which allows to couple a pair of optical beams carrying modulation information. In accordance with this invention, two optical beams emanate from transceivers at two different locations. Each beam may not see ... | 09/26/2006 |
| 7106487 | Thermal tuning of a laser using doped silicon etalon In embodiments of the invention, a wavelength-selective device is doped with n-type or p-type material to make the single-crystal silicon in the active region of the device electrically conductive. An electrically conductive and thermally conductive active region al... | 09/12/2006 |
| 7106975 | Optical signal processing system There are provided a first optical transmitting device for transmitting a first light having a first wavelength in a continuous light state and a second light having signal optical pulses and a second wavelength, a first optical amplifier for receiving the first lig... | 09/12/2006 |
| 7079779 | Repeater apparatus, communication equipment, communication system thereof and repeating method A repeater apparatus (1001) is constituted from infrared transmitter sections (1s, 2s, 3s) and infrared receiver sections (1r, 2r, 3r) as well as connection control sections (... | 07/18/2006 |
| 7079536 | Method to perform central control, a line terminator and an element controller realizing such a method and a tree-like network including such a line terminator and an element controller The present invention concerns a method to perform central control of in-line element (Ei) in a tree-like network by a line terminator (LT). A plurality of network terminators (NT1, NT2, . . . , NTi, . . . , NTn) are coupled via one or more of such in-... | 07/18/2006 |
| 7076174 | Method, device, and system for processing optical signal The present invention relates to a method for processing an optical signal is provided. An optical signal is input into an optical waveguide structure for providing a nonlinear effect. As a result, the optical signal undergoes chirping induced by the nonlinear effec... | 07/11/2006 |
| 7072589 | Method and apparatus for controlling the power level in an optical regenerator An optical regenerator enabling matching of self-phase modulation induced spectral broadening and optical regenerator filter center wavelengths and bandwidths for different fiber dispersion values. The regenerator monitors the central part of an input signal spectru... | 07/04/2006 |
| 7068946 | Modulation scheme for tedons A system and method for increasing transmission distance and/or transmission data rates using tedons and an encoding scheme to reduce the number of ones in a data signal is described. For example, the method for increasing transmission distance and transmission data... | 06/27/2006 |
| 7054057 | Multi-frequency light source A multi-frequency light producing method and apparatus multiplies the number of optical channels present in an incident wavelength division multiplexed (WDM) signal light source by four-wave mixing (FWM) the WDM signal with at least one pump lightwave at least one t... | 05/30/2006 |
