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7085496 |
Passive add/drop amplifier for optical networks and method
An add/drop node for an optical network comprises a passive splitter to split an ingress signal from the network into a first ingress signal and a second ingress signal. A first amplified splitter...
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7085450 |
Fabrication of structures in an optical substrate
A system and method for fabricating structures in an optical substrate. An optical element produces first and second write beams that intersect at a first intersection location at the optical...
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7085451 |
Optical fiber gratings with azimuthal refractive index perturbation
The present invention relates to a type of optical fiber grating having an azimuthal refractive-index perturbation. The optical fiber includes a fiber grating that has a plurality of grating...
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7081215 |
Electrically switchable polymer-dispersed liquid crystal materials including switchable optical couplers and reconfigurable optical interconnects
A new photopolymerizable material allows single-step, fast recording of volume holograms with properties that can be electrically controlled. Polymer-dispersed liquid crystals (PDLCs) in accordance...
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7082234 |
Wavelength division multiplexing device capable of compensating for dispersion and dispersion slope using purely phase-sampled fiber bragg grating
Disclosed herein is a wavelength division multiplexing device. The wavelength division multiplexing device includes a first optical circulator and a Fiber Bragg Grating (FBG). The first optical...
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7079311 |
Optical amplifier and optical communication system including the same
The present invention relates to an optical amplifier (TDFA) having a configuration which enables to reduce temperature dependence of the gain with reduced power consumption and simple control. The...
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7079730 |
Integrated hybrid optoelectronic devices
A hybrid optoelectronic device and method of producing the hybrid device in which the hybrid device includes a substrate with an input region configured to accept input light, a sol-gel glass...
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7079729 |
Apparatus for generating an optical interference pattern
Apparatus for producing an interference pattern from an input optical beam, including a first optical element for separating the input optical beam into a plurality of divergent optical sub-beams...
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7079728 |
Wavelength multiplexing processing apparatus
A wavelength multiplexing processing apparatus for use with a wavelength division multiplexing system is disclosed which uses a single AWG to achieve reduction in cost, size and loss. The...
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7079770 |
System and apparatus for dropping and adding optical data streams in an optical communication network
A system and apparatus for dropping and adding optical data streams in an optical communication network uses a photonic switching fabric for dropping but not adding optical data streams, and uses a...
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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,...
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7076133 |
Optical coupling
The invention relates to the coupling of light to and from an optical waveguide, such as an optical fiber. Light of a specific wavelength is deflected out from the fiber, or into the fiber, in a...
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7072550 |
Method of determining quasi-phase matching efficiency in periodically poled structure of optical waveguide, periodically poled structure of optical waveguide, and optical waveguide using the same
The present invention relates to a method of determining a quasi-phase matching efficiency in a periodically poled structure of an optical waveguide, a periodically poled structure of an optical...
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7072545 |
Dispersion compensator, method for manufacturing the same, and method for compensating wavelength dispersion
A dispersion compensator includes at least one first optical waveguide, a first slab waveguide, an arrayed waveguide connected to the at least one first optical waveguide via the first slab...
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7072546 |
Compensation for chromatic dispersion
A plurality of channels of a wavelength division multiplexing system may be subjected to dispersion compensation in a fashion which enables tuning of the compensation for each individual wavelength...
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7068934 |
Optical interconnect
An optical interconnect comprises an input configured to receive light of a plurality of light wavelengths and a plurality of holographic optical elements. Each element configured to reflect one...
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7068885 |
Double diffraction grating planar lightwave circuit
The invention relates to a planar lightwave circuit including a pair of opposed concave reflective diffraction gratings sharing the same focal line, which separates first and second slab waveguide...
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7068886 |
Millimeter wave oscillator using fiber Bragg grating
Provided is a millimeter wave oscillator for generating a high frequency signal required in wireless communication. The millimeter wave oscillator uses an overwritten fiber Bragg grating and a...
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7068866 |
Slow wave optical waveguide for velocity matched semiconductor modulators
A PIN electro-optical traveling wave modulator ( 10 ) including diffraction gratings ( 34, 36 ) positioned at opposing sides of an optical waveguide ( 20 ) that act to change the propagation...
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7068943 |
Devices and methods for dynamic dispersion compensation
The present invention provides devices and methods for dynamic dispersion compensation. According to one embodiment of the invention, a dispersion compensating device includes a negative dispersion...
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7068879 |
Gain flattening device for an optical fiber amplifier
A gain flattening device for an optical fiber amplifier. In the gain flattening device, a first end portion, having first and second ends, receives an amplified optical signal from a first...
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7068869 |
Passive athermal fiber bragg grating strain gage
Fiber Bragg gratings (FBGs) are particular suitable for measuring strain. However, a single parameter measurement is difficult to implement, since cross-sensitivity to temperature compels the use...
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7068884 |
Apodized fiber bragg grating and improved phase mask, method and system for making the same
An apodized fiber Bragg grating, and a phase mask, method and system for making such a grating are disclosed. The refractive index profile of the grating has a periodic apodization phase component...
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7068897 |
Method for restoring or increasing photosensitivity in hydrogen or deuterium loaded large diameter optical waveguide
The present invention provides a new and unique method for increasing the photosensitivity of a large diameter optical waveguide having a cross-section of at least about 0.3 millimeters. The method...
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7065266 |
Benzocyclobutene polymer (BCB) as a passivation layer for optical passive elements
An InP-based photonic integrated circuit (PIC) includes an optical passive element in the circuit with no bias current applied to such an element. A passivation cladding layer overlies a surface of...
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7065298 |
Code-based optical networks, methods, and apparatus
Optical communication systems include a central station that encodes data transmitted to multiplexing (mux) stations or user stations. The central station also decodes data received from the mux...
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7065272 |
Fiber-to-waveguide coupler
An optical waveguide to fiber coupler comprises a substrate, a first waveguide and a second waveguide. The first and second waveguides are formed on the substrate and intersect at a right angle. A...
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7065273 |
Wideband arrayed waveguide grating
A flat-top arrayed waveguide grating with wideband transmission spectrum may be produced by integrating a series of directional couplers to the output slab waveguide coupler of a dual...
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7061610 |
Photonic integrated circuit based planar wavelength meter
A method and device for measuring the wavelength of a source, for example monitoring a laser used in DWDM fiber optic communications systems, wherein the method and device comprise using a coarse...
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7062131 |
Optical coupling for whispering-gallery-mode resonators via waveguide gratings
This application describes whispering gallery modes resonators that are optically coupled to one or two waveguide grating couplers formed on a substrate.
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7062127 |
Athermal AWG and AWG with low power consumption using groove of changeable width
Optical integrated circuits are disclosed having a gap traversing the lens or the waveguide grating and an actuator that controllably positions the optical integrated circuit on each side of the...
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7062126 |
Tunable optical filter having large diameter optical waveguide with bragg grating and being configured for reducing the bulk modulus of compressibility thereof
A tunable optical filter has a large diameter cane waveguide with “side-holes” in the cane cross-section that reduce the force required to compress the large diameter optical waveguide without...
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7062123 |
System for higher-order dispersion compensation
A higher-order dispersion compensator for tuning a polarization controlled signal having a first order polarization mode dispersion component, a second order polarization mode dispersion component,...
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7058262 |
Arrayed waveguide grating
An arrayed waveguide grating (AWG) device is described in which there are a plurality of output waveguides ( 10 ) coupled at one end to the output side of an second optical interaction region ( 4 )...
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7056037 |
Optical bidirectional module
An optical bidirectional module 10 having therein light emitting element 11 which transmits optical signal to the end facet of the optical fiber, light receiving element 12 which receives...
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7058263 |
Optical transport network
An optical transport network comprises a monolithic transmitter photonic integrated circuit (TxPIC) InP-based chip and a monolithic receiver photonic integrated circuit (RxPIC) InP-based chip.
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7058251 |
Wavelength selective optical switch
A wavelength selective optical switch particularly usable as a programmable N×M optical switch in a multi-wavelength communication system. The switch uses a grating that separates multi-channel...
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7058249 |
Waveplate and optical circuit formed using mesogen-containing polymer
Waveplate, planar lightwave circuit incorporating the waveplate, and method of making an optical device. The waveplate is formed of a mesogen-containing polymer film having a backbone and...
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7054526 |
Optical multiplexer/demultiplexer
An optical multiplexer/demultiplexer uses a diffraction grating, capable of multiplexing/demultiplexing lights of narrow wavelength spacing at a short focal distance. To this end, a plurality of...
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7054525 |
Device for tuning a Bragg grating by means of compression using a piezoelectric actuator
A device for tuning a Bragg grating, by compression by a piezoelectric actuator. The device is particularly applicable to optical telecommunications and for example includes a mechanism to compress...
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7050676 |
Optical signal encoding apparatus and decoding apparatus
There is provided an apparatus for performing, by optical code division multiplex access, at least one of encoding and decoding of wavelength-division-multiplexed light. The apparatus includes: an...
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7050677 |
Optical fiber and method for producing the same
An optical fiber includes an entrance face that is optically coupleable with a device for transmitting a light beam through the optical fiber. The entrance face includes a core region and a...
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7050662 |
Fiber Bragg grating compression sensor system
A fiber Bragg grating compression sensor and a flexure mount that is attached to the sensor to significantly enhance its compression sensitivity. By incorporating the flexure mount, compressive...
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7050663 |
Integrated optical circuit having an integrated arrayed waveguide grating (AWG) and optical amplifier(s)
An integrated optical circuit includes waveguides formed in the integrated optical circuit. One set of waveguides is a set of optical amplifiers doped with rare earth ions. A second set of...
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7050719 |
Wavelength division multiplexing receiver for wavelength tracking
The WDM receiver includes a wavelength demultiplexer, a detector array and a signal extractor. The wavelength demultiplexer receives an n-channel optical input signal and transmits the n-channel...
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7050674 |
Method for fabricating polymeric optic waveguide grating
Disclosed is a fabrication method of a polymeric optic waveguide grating, the method including: forming a core layer of a polymeric material on a substrate; irradiating an ultraviolet ray to the...
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7050675 |
Integrated optical multiplexer and demultiplexer for wavelength division transmission of information
A multiplexer/demultiplexer is provided for optical interconnection between electronic components on an integrated circuit chip. The multiplexer/demultiplexer includes a substrate formed with an...
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7050673 |
Temperature control device and arrayed waveguide grating optical wavelength multiplexer/demultiplexer
In a temperature control device which maintains an object to be controlled at a preset constant temperature and an arrayed waveguide grating optical wavelength multiplexer/demultiplexer, the...
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7046886 |
Hydrogen concentration relocation in optical fiber
A system and method in accordance with the present invention applies short bursts of a high temperature fluid to a hydrogen-loaded fiber to relocate the hydrogen within the fiber in the proximity...
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7043120 |
Array waveguide grating
An array waveguide grating structure includes an input MMI that receives an input optical signal and splits the optical signal into a plurality of signals, each having a defined wavelength. A...
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