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| Number | Title | Issue Date |
| 7272313 | System with node apparatuses in IP/WDM network A system, including: a source node apparatus; a destination node apparatus; the source node apparatus and the destination node apparatus both being in an Internet Protocol/Wavelength Division Multiplexing network; an initial path connecting the source node apparatus... | 09/18/2007 |
| 7272320 | Time division multiplexing of inter-system channel data streams for transmission across a network A time division multiplexing (TDM) facility is presented for time division multiplexing at least two inter-system channel (ISC) data streams to create a TDM multiplexed data stream. The TDM multiplexed data stream can be forwarded across the network over a single wa... | 09/18/2007 |
| 7272277 | Data exchange architecture using optical links A data exchange architecture using optical links. A device is proximate to a display screen. An optical module is coupled to the device. An optical link is coupled to the optical module, wherein the optical module to convert optical signals received by the optical m... | 09/18/2007 |
| 7272289 | Low bend loss optical fiber An optical fiber having both low macrobend loss and low microbend loss. The fiber has a MAC number less than 7.0 and a zero dispersion wavelength less than 1450 nm. The optical fiber advantageously comprises a primary coating and a secondary coating. The primary coa... | 09/18/2007 |
| 7272278 | Optical multiplexer/demultiplexer The present invention relates a variable optical multiplexer/demultiplexer which can be made smaller and can restrain characteristics from deteriorating. The optical multiplexer/demultiplexer comprises a first optical system, a wavelength branching device, a second ... | 09/18/2007 |
| 7272321 | Passive optical network A passive optical network. The optical network has an optical fiber ring with ends terminating at an optical line terminal. The optical line terminal transmits signals through the fiber ring to optical network units passively connected to the fiber ring. The optical... | 09/18/2007 |
| 7271948 | Method and apparatus for reducing crosstalk and nonlinear distortions induced by raman interactions in a wavelength division mulitplexed (WDM) optical communication system A method and apparatus is provided for transmitting a WDM optical signal. The method begins by modulating a plurality 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... | 09/18/2007 |
| 7272270 | Optical modulator and method of manufacturing same Laser light emitted from a vertically confined surface emitting laser (VCSEL) is incident on a side surface near an end region of an optical waveguide. The end region of the optical waveguide is processed by polishing to taper at an angle of 45 degrees, and an optic... | 09/18/2007 |
| 7272274 | Module to couple to an electrical and an optical backplane in a chassis A chassis includes a plurality of slots to receive modules. The chassis includes an electrical backplane to couple to a module received in a first slot of the plurality of slots. The module to couple via a first communication interface on the module. An optical back... | 09/18/2007 |
| 7272323 | Bi-directional electrical to optical converter module A bi-directional (BiDi) electrical to optical converter (transceiver) module is described that contains means for communicating in a full duplex fashion over one fiber. Furthermore, an automatic fail-over capability is included which allows redundancy to be build in... | 09/18/2007 |
| 7272276 | Optical performance monitor An optical performance monitor for measuring the performance of optical networks has an echelle grating for demultiplexing an input beam into a plurality of wavelengths that are focused onto an array of divided output waveguides. Each divided output waveguide is pos... | 09/18/2007 |
| 7269311 | Remote antenna unit and wavelength division multiplexing radio-over-fiber network Disclosed is a remote antenna unit and a wavelength division multiplexing network. The remote antenna unit includes: an optical circulator having a plurality of ports; an electric field absorption modulator having a first input/output end and a second reflective end... | 09/11/2007 |
| 7269350 | 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 t... | 09/11/2007 |
| 7269352 | Wavelength division multiplexing light source apparatus using semiconductor optical amplifier A WDM (Wavelength Division Multiplexing) light source apparatus using a SOA (Semiconductor Optical Amplifier) is disclosed. The WDM light source apparatus includes N SOAs, a 1×N multiplexer/demultiplexer, and a reflective mirror. The N SOAs have one end coated with... | 09/11/2007 |
| 7269358 | Optical transmitter for increased effective modal bandwidth transmission An optical transmitter for an optical fiber transmission system is described. The optical transmitter includes an optical source that generates an optical signal having a wavelength at an output. An optical intensity modulator modulates the optical signal with an el... | 09/11/2007 |
| 7269312 | Bipolar RF-photonic transversal filter with dynamically reconfigurable passbands An architecture that enables one to realize a FIR transversal filter with apodized, interlaced bipolar tap coefficients (an). The tap coefficients, an, are varied via the control of the optical powers emitted by an array of WDM laser sources. A... | 09/11/2007 |
| 7268927 | Tunable optical filter array and method of use According to an exemplary embodiment of the present invention, an optical apparatus includes an optical filter array which comprises a plurality of optical filter elements, wherein at least one of the optical filter elements is adapted for tuning to two or more wave... | 09/11/2007 |
| 7266277 | Optical device, optical device manufacturing method, and optical integrated device In a multi-mode interference waveguide (MMI) of a sheet shape spreading in the length direction and the width direction, the length of the multi-mode interference waveguide is set to such a length that the unique mode interferes in the length direction, thereby redu... | 09/04/2007 |
| 7266278 | Communication system using sheet-shaped light guide In a communication system using a sheet-shaped light guide (91), which includes particles for scattering light in a sheet-shaped optical medium and propagates signal light incident from one end face of the sheet-shaped light guide to the other end face side w... | 09/04/2007 |
| 7266281 | Optical fiber patch box A patch box including a housing in which the housing has a rail-mounting latch. An optical fiber assembly mounted within the housing wherein the housing has connectors mounted thereon. The optical fiber assembly connects between at least two of the connectors. ... | 09/04/2007 |
| 7266297 | Optical cross-connect A bit-rate-transparent electrical space-division switching matrix is employed in an optical cross-connect and the input/output stage is constructed from simple, broadband optical receivers and transmitters. Since the switching matrix operates in unclocked manner, i.... | 09/04/2007 |
| 7266299 | Add/drop-drop and continue-module and drop and continue module A tunable add/drop&continue or drop&continue module comprises two optical filters where at least one is tunable and that are arranged following one another between a branching unit for optical signals and an insertion unit follow a branching unit for optical signals... | 09/04/2007 |
| 7266257 | Reducing crosstalk in free-space optical communications An optical transmitter includes a modulator, a dispersion adjustment module, and an optical amplifier. The optical transmitter is configured to transmit optical pulses over a free-space optical communication channel. The modulator is configured to produce an optical... | 09/04/2007 |
| 7266265 | Low-loss shared FTTH distribution network A low-loss shared FTTH distribution network that enables optical communications within a subscriber area, including optical fibers routed from a point of distribution to the subscriber area, a tap device including an optical tap which interfaces a downstream optical... | 09/04/2007 |
| 7266268 | Diffraction grating Diffraction gratings for coupling an electromagnetic wave into a planar waveguide are disclosed. The diffraction grating may include a first diffraction grating and a second diffraction grating slanted relative to one another. Alternatively, the diffraction grating ... | 09/04/2007 |
| 7266264 | Apparatus and method of compensating transmission property of light demultiplexer/light multiplexer The present invention offers a compensation device having a transmission property for collectively compensating inclinations of accumulated transmission properties in a signal wavelength band of light signals of a plurality of channels configuring a wavelength-multi... | 09/04/2007 |
| 7266300 | BPSR optical transmission node A bi-directional path switched ring optical transmission node has simple configuration which reduces the influence of a wave reflected by an obstacle on optical line.The BPSR optical transmission node connects to a first optical line through which an odd channel sig... | 09/04/2007 |
| 7265882 | Switchable polymer-dispersed liquid crystal optical elements Transmission and reflection type holograms may be formed utilizing a novel polymer-dispersed liquid crystal (PDLC) material and its unique switching characteristics to form optical elements. Applications for these switchable holograms include communications switches... | 09/04/2007 |
| 7265366 | Lithographic apparatus and device manufacturing method A lithographic apparatus includes a radiation source configured to provide radiation to an illumination system, the radiation source configured to provide radiation in a first wavelength range and in a second wavelength range, the second wavelength range being diffe... | 09/04/2007 |
| 7265896 | Optical power combining for optical frequency conversion having nonlinear feedback Wavelength combining for nonlinear frequency conversion is provided having nonlinear feedback to the sources being combined. Power that is fed back to the sources is obtained from within a wavelength conversion device. Therefore, the feedback power to a source has a... | 09/04/2007 |
| 7265903 | Switchable polymer-dispersed liquid crystal optical elements Transmission and reflection type holograms may be formed utilizing a novel polymer-dispersed liquid crystal (PDLC) material and its unique switching characteristics to form optical elements. Applications for these switchable holograms include communications switches... | 09/04/2007 |
| 7263257 | Gires-Tournois etalons and dispersion compensation A first embodiment of the invention provides a Gires-Tournois etalon (DGTE) 20 comprising a cladding mode suppressed optical fibre 22, including an etalon section 24 in which a weakly reflective optical waveguide grating 26 and a strongly... | 08/28/2007 |
| 7263256 | Optical connection block, optical module, and optical axis alignment method using the same An optical module is disclosed. The optical module includes a substrate, and at least one planar optical waveguide that includes a plurality of waveguides and at least one groove vertically penetrating the upper surface of the substrate and which is successively lam... | 08/28/2007 |
| 7262904 | Tunable optical add/drop device Improved designs of optical devices for processing optical signals with one or more specified wavelengths are disclosed. According to embodiment, a filter mirror assembly appears an “L” shape and provides a filtering function as well as a reflecting function. Th... | 08/28/2007 |
| 7263288 | Optical routing using a star switching fabric In one embodiment, a router includes a plurality of line cards each operable to receive at least one packet comprising an identifier associated with a destination element external to the router. Each line card includes a look-up table operable to facilitate routing ... | 08/28/2007 |
| 7263252 | Optical switch and method of controlling optical switch An optical switch of the present invention includes at least one input optical fiber, output optical fibers, at least one movable mirror for directing a light beam from the input optical fiber selectively to one of the output optical fibers, and at least one shutter... | 08/28/2007 |
| 7263248 | Optical via to pass signals through a printed circuit board An optical via within a printed circuit board (PCB) to route optical signals from one level to another through the PCB. The optical signals entering the optical via from an optoelectronic device, or other source, may be routed by an optical waveguide to enter other ... | 08/28/2007 |
| 7263247 | Integrated optical isolator array An integrated isolator array is provided having a plurality of waveguides fabricated in a planar optical substrate, each waveguide having input and output sections. An isolator subassembly is received within a transverse trench formed in the substrate between the in... | 08/28/2007 |
| 7263253 | Optimized reconfigurable optical add-drop multiplexer architecture with MEMS-based attenuation or power management A wavelength selective switch architecture for ROADMs for switching the spectral channels of a multi-channel, multi-wavelength optical signal between input and output ports employs a biaxial MEMS port mirror array for optimal coupling efficiency and ITU grid alignme... | 08/28/2007 |
| 7263291 | Wavelength division multiplexing source using multifunctional filters This invention provides a system that combines a wavelength multiplexer with an FM discriminator for chirp reduction and wavelength locker in a filter to produce a wavelength division multiplexed signal with reduced chirp. A partially frequency modulation laser sign... | 08/28/2007 |
