Matches 101 - 150 out of 391 < 1 2 3 4 5 6 7 8 >
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6504970 Planar lightwave wavelength blocker  
A method and apparatus are disclosed for filtering an input wavelength-division multiplexed (WDM) signal comprised of N wavelength channels. The disclosed wavelength blocker includes a...
6501896 Optical waveguide circuit  
The present invention relates to an optical waveguide circuit such as an arrayed waveguide grating, etc. A lower cladding is formed on a silicon substrate. A core having the following waveguide...
6501885 Optical waveguide coupler and method for producing same  
The optical waveguide coupler comprises a structure ( 1 ) of a number of elongated narrow optical waveguide strips ( 2 ), which consist respectively of a front area ( 3 ), a center area ( 4 ) and a...
6498878 Arrayed waveguide grating  
An arrayed waveguide grating for multiplexing or demultiplexing WDM optical signals is fabricated by forming an input waveguide, an input slab waveguide, arrayed waveguides, an output slab...
6493487 Optical waveguide transmission devices  
An optical waveguide device comprising a free space region, suitably provided by a slab waveguide, having optical signal ports for coupling to input and output waveguide sections and an optical...
6466715 Multiplexer/demultiplexer for WDM optical signals  
At least one input waveguide, plural output waveguides, an arrayed waveguide diffraction grating composed of plural channel waveguides successively extending in a length by ΔL, an input slab...
6466707 Phasar athermalization using a slab waveguide  
A passive temperature-compensated integrated optical component having an array of adjacent waveguides, and a slab waveguide located within a groove at an intermediate section of the array. The...
6456760 Optical signal processing apparatus and optical signal processing method  
An optical signal processing apparatus includes a first optical waveguide and a first slab waveguide configured to equally distribute an output light of the first optical waveguide. A first arrayed...
6442308 Optical wavelength multiplexer/demultiplexer with uniform loss  
Disclosed is an optical wavelength multiplexer/demultiplexer with uniform loss. The optical wavelength multiplexer/demultiplexer includes a first star coupler for dividing optical power of input...
6434303 Optical waveguide slab structures  
An optical waveguide device comprising a free space region, suitably provided by a slab waveguide, having optical signal ports for coupling to input and output waveguide sections and an optical...
6426821 Optical upconverter apparatuses, methods and systems  
Apparatuses, methods, and systems are disclosed that provide for simultaneously upconverting electrical signals carrying information at electric frequencies onto optical subcarrier lightwave...
6400872 Trimmed integrated optical multi-beam interferometer  
For the trimming of an arrayed waveguide grating ( 1 ) of an integrated optical multi-beam interferometer which is comprised of a large number (N) of waveguides (i) at least one (j) of these...
6400513 Optical beam coupling of multiple wavelengths into an output channel using spatial wavefront segmentation  
An apparatus and method for coupling an array of light beams extending predominantly in one direction into an output port. The light beams are rearranged into a desired shape which extends more...
6385366 Fiber to the home office (FTTHO) architecture employing multiple wavelength bands as an overlay in an existing hybrid fiber coax (HFC) transmission system  
A method of operating a hybrid fiber coax transmission system to provide Fiber to the Home Office (FTTHO) functionality comprises directing, via a fiber portion of the transmission system, first...
6385373 Compensated cascaded waveguides  
When two star couplers are cascaded so as to perform two Fourier transformations without phase distortions, an imaging arrangement results which accurately reproduces at the output the input...
6381384 Flexible WDM network architecture  
A unidirectional or bidirectional node for use in an optical communications network, a network consisting of such nodes. The node comprises one or more optical couplers as well as either or both of...
6377730 Waveguide based component optical signal power and wavelength detector  
A planar waveguide monitor is shown for determining the wavelength and power of component optical signals of a multiplexed optical signal. The monitor includes an optical waveguide router similar...
6356692 Optical module, transmitter, receiver, optical switch, optical communication unit, add-and-drop multiplexing unit, and method for manufacturing the optical module  
A method is supported for aligning the height of a polymer waveguide to the height of a core layer of a semiconductor element in an optical module composed so as to mount the semiconductor element...
6339664 Wavelength division multiplexing  
An arrayed wavelength grating device has a series of waveguiding channels ( 3 ) interconnecting two free space regions ( 2,4 ) across which light inputting and outputting the device passes. There...
6337936 Optical amplifier, and method and apparatus for monitoring an optical fiber transmission path  
An optical amplifier comprises an optical circulator and an optical fiber grating connected to this. The optical fiber grating reflects a backscattered light of a probe light coming back from an...
6304687 Optical waveguide circuit, its manufacturing method and optical waveguide module having the optical waveguide circuit  
In a light waveguide circuit including a plurality of waveguides having different length, a material (10) having a temperature coefficient of a refractive index including a symbol different from...
6301412 Apparatus and method for making multi-branching optical coupler  
A mask having a center hole for passing through a center fiber, which is one of multiple fibers, and multiple surrounding holes for passing through surrounding fibers, which are the remainder of...
6289147 Passband flattening of a phasar  
A passband-flattened phasar including two free space regions coupled by a plurality of waveguides having predetermined differences between their lengths so as to act as an arrayed waveguide...
6289146 Optical component of the waveguide array spectrograph type, having centered outlet channels  
The present invention relates to an optical component of the waveguide array spectrograph type, the component comprising an inlet coupler and an outlet coupler between which said array extends, and...
6285810 Tunable add/drop optical device  
Tunable add/drop optical device for injecting or extracting (add/drop) at least a selected optical channel or carrier wavelength in or from a set of multiplexed channels or carriers of different...
6282344 Intersecting N x M star couplers for routing optical signals  
Overlapped coupler combination Photonic Lightguide Circuits for routing optical signals within an optical communication system include at least two couplers whose planar slab waveguides are...
6278814 1×N optical wavelength-division demultiplexer alignment apparatus and 1×N optical wavelength-division demultiplexer therefor  
A 1×N optical wavelength-division demultiplexer alignment apparatus including a 1×N optical wavelength-division demultiplexer including an input waveguide, N output waveguides and a plurality of...
6272270 Optical wave combining/splitting device  
The present invention expands a selective wavelength band and flattens light intensity in the selective wavelength band as good as or better than prior art, and makes power loss less than prior...
6263127 Free-space/arrayed-waveguide router  
A router combines free-space and guided wave optics to drastically increase the number of channels used in WDM transmission systems. The two-stage router uses the partial demultiplexing...
6263146 Apparatus for optically generating chaotic random numbers  
An apparatus for optically generating chaotic random numbers to obtain chaotic random numbers satisfying a chaotic dynamical system expressed by X(n+1)=F(X(n)) includes an optical signal splitting...
6259833 Optical cross connect using a planar arrangement of beam steerers  
A strict-sense nonblocking N×N spatial optical cross connect that employs planar lightwave beam steerers. The beam steerers allow for a modular design without requiring two-dimensional...
6256427 Process for creating several data circuits on an optical fiber and device for embodiment of the process  
This invention relates to a process for setting up several data paths on a single optical transmission fiber, including a modulation step consisting, for each data path, of modulating a light...
6240118 Multichannel laser transmitter with a single output port  
A multichannel laser is based on an interleaved chirped waveguide grating router. An interferometric modulator is incorporated inside a laser cavity by means of a waveguide grating router and...
6240227 Star-type optical coupler  
Optical fibers used in a star-type optical coupler each have a light signal input terminal and a light signal output terminal. A light signal passes through the optical fibers in a linear...
6236782 Grating assisted coupler devices  
An add/drop filter for optical wave energy incorporates a Bragg grating in a very narrow waist region defined by merged lengths of elongated optical fibers. Light is propagated into the waist...
6236781 Duplicated-port waveguide grating router having substantially flat passbands  
A duplicated-port waveguide grating router is provided that includes a first free space region configured to receive an optical signal from at least one input waveguide. An optical grating...
6229935 Dispersion slope compensation in optical transmission systems  
A wavelength division multiplex transmission system has an optical fiber trunk (12) with one or more branching units (18) each providing an add/drop channel (22, 20). In the branch, components are...
6229943 Optical circuit device and wavelength router  
A wavelength router has a structure capable of preventing a wavelength shift from occurring and an optical circuit device capable of reducing a phase error. The wavelength router includes three...
6229938 WDM filter  
The present invention provides a wavelength division multiplexing filter that requires lower costs, a smaller size, and a smaller amount of fiber routing operations. According to the present...
6226425 Flexible optical multiplexer  
A multiplexer has an optical circulator including at least first, second and third circulator ports. An optical fiber with a first optical transmission path is coupled to the first circulator port...
6222956 Optical wavelength multiplexer/demultiplexer  
Plurality of channel waveguides of an arrayed waveguide diffraction grating are arranged such that all of intervals thereof are not constant between each two adjacent channel waveguides at a first...
6222955 Integrated 1×N optical switch  
An optical apparatus is disclosed that includes a first Z×T optical switch having Z input ports and T output ports, where T is at least 2, optically coupled to an integrated optical generalized...
6222965 Bias control system for electrooptic devices  
An optical device includes a substrate formed of an electrooptic material, a waveguide formed in the substrate, an electrically conductive film formed over at least a portion of the waveguide and a...
6222957 Dispersion slope compensator  
A dispersion slope compensator includes a dispersion compensation fiber, an optical circulator and a plurality of fiber gratings. The optical circulator is connected between an optical fiber and...
6219471 Optical device having equal length waveguide paths  
An optical device having an array of substantially equal-length optical waveguides. Each one of the optical waveguides includes one or more straight segments, one or more curved segments, and...
6219480 Optical coupler for coupling light between one and a plurality of light ports  
An optical coupler for coupling light along an axis between a light port on one side of the coupler and a plurality of light ports on another side of the coupler. The coupler comprises a one-side...
6219477 Multiport single path optical system and associated method  
In an optic fiber, different first and second optical signals are transmitted through optic fiber in the first direction. The first optical signal may be infrared, whereas the second optical signal...
6219479 Optical star assembly  
An optical star assembly having a ribbon fiber optic mixing element with the first and second ends. A first and second bundle of fiber optic cables are provided each with an engagement end for...
6205273 Waveguide grating router having a predetermined composite amplitude spectrum  
In a waveguide grating router, a predetermined composite transmission spectrum output is achieved by eliminating loss imbalances through the use of variable loss elements. The variable loss...
6192172 Optical wavelength-space cross-connect switch architecture  
A multi-wavelength optical cross-connect switch architecture incorporates a plurality of wavelength-selective optical cross-connect (WSXC) switch fabrics that receive multi-wavelength input signals...
Matches 101 - 150 out of 391 < 1 2 3 4 5 6 7 8 >