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| Number | Title | Issue Date |
| 7643207 | Semiconductor optical amplifier with lateral and distributed gain stabilisation A stabilised gain semiconductor optical amplifier (CG-SOA) includes and active waveguide (1) comprising an amplification medium (2), extending in longitudinal (Z), lateral (X) and vertical (Y) directions, and coupled to a laser oscillation structure co... | 01/05/2010 |
| 7603006 | Optical switch having angle tuning elements and multiple-fiber collimators An optical switch with a compact form factor includes a multiple-fiber collimator and an angle tuning element for deflecting an optical beam from an input fiber into one of at least two output fibers. The angle tuning element may be provided between a pair of coaxia... | 10/13/2009 |
| 7577369 | Systems for deploying an optical network A transmitter on an integrated circuit chip is disclosed that employs a laser, modulator, and a dispersion compensator module and a modulator for overcoming chromatic dispersion and polarization dependent loss effects. With the present invention, the dispersion comp... | 08/18/2009 |
| 7512162 | Dynamic thermal management of laser devices The present invention generally relates to dynamic thermal management of a device. In one aspect, a method for thermally controlling a device is provided. The method includes setting a value of a set point in a thermoelectric cooler, wherein the set point correspond... | 03/31/2009 |
| 7484900 | Air cavity plastic package for high frequency optical devices The present invention generally relates to an air cavity plastic package for a high frequency optical device. In one aspect, a module package for a high frequency optoelectronic device is provided. The module package includes an upper plastic housing having an upper... | 02/03/2009 |
| 7486443 | High extinction ratio and low crosstalk compact optical switches An improved optical switch utilizes one polarization modulator, with the beam components traversing it twice. Because of the twice traverse, the extinction ratio of the switch is doubled without the addition of another polarization modulator, thus avoiding the costs... | 02/03/2009 |
| 7486851 | Tunable single-channel dispersion compensator for high-speed optical systems One embodiment of the present invention includes a plurality of first optical elements and a second optical element optically coupled to one another in cascaded fashion. Each first optical element has a group delay response characterized by a first period such that ... | 02/03/2009 |
| 7460739 | Lithium niobate optical modulator An optical modulator comprises a Z-cut lithium niobate substrate (21) on which is formed a Mach-Zehnder interferometer having two generally parallel waveguides (23, 25) lying beneath a buffer layer of dielectric material (27). First and second g... | 12/02/2008 |
| 7457544 | Single channel four-port group delay compensation equalizer A group delay compensation equalizer is disclosed that employs a single channel four-port WDM device for compensating the group delay experienced by a plurality of wavelengths transmitted over different paths. The transmission differential between two wavelengths is... | 11/25/2008 |
| 7454143 | Reconfigurable thin film based DWDM devices for reconfigurable add-drop optical systems A reconfigurable thin film based dense wavelength division multiplexing (DWDM) device is described for hitless switching of wavelengths by employing a reconfigurable filtering device. The reconfigurable filtering device is based on a mechanical switching of a filter... | 11/18/2008 |
| 7430354 | Method and apparatus for reduction of optical coupling between pump lasers and photodetectors in optical amplifiers In a first aspect, the present invention comprises an optical filter comprising a fiber having a core and a cladding and a light-absorbing coating applied onto a portion of the fiber cladding, the coating attenuating loosely bound cladding modes. In another aspect, ... | 09/30/2008 |
| 7394995 | System and method for a compact optical receiver with wide dynamic range An optical receiver is disclosed comprising an erbium-doped fiber amplifier (EDFA) that is coupled to a photodiode and transimpedance amplifier without filtering output light signal in the EDFA. Optionally, a clock/data regenerator can be coupled to the electrical o... | 07/01/2008 |
| 7376306 | Slanted Bragg grating gain flattening filter having spatially overlapping elementary filters and a manufacturing method therefor An optical filter comprises a waveguide and a plurality of Slanted Bragg Gratings written in the waveguide, wherein at least two of the Slanted Bragg Gratings overlap one another. A method of producing an optical filter comprises the steps of passing an ultraviolet ... | 05/20/2008 |
| 7340130 | Method for assembly of multi-ports optical apparatus The present invention describes a structure and method for a multi-ports WDM device for compensating the filter distortion while reducing insertion loss. The multi-ports WDM device comprises a 4-fiber collimator having a grin lens and a 2-fiber collimator having a l... | 03/04/2008 |
| 7336872 | Localized annealing of UV induced index grating in optical waveguides A method for producing a Bragg grating in an optical waveguide device such as an optical fiber. The optical fiber is exposed to a UV source through a phase mask and this produces a Bragg grating on the fiber. The grating on the fiber is overexposed such that the gra... | 02/26/2008 |
| 7336901 | Reconfigurable optical add-drop multiplexers employing optical multiplex section shared protection A reconfigurable optical add-drop multiplexer is disclosed that enables Optical Multiplex Section (OMS) shared protection rings. The ROADM comprises a first optical supervisory module, coupled to a first amplifier module, which in turn is coupled to a first broadcas... | 02/26/2008 |
| 7333686 | System and method for a re-configurable optical channel dropping de-multiplexer A re-configurable channel dropping de-multiplexer comprises an input, an output, a first 1×2 optical switch optically coupled to the input, a second 1×2 optical switch optically coupled to the output, a plurality of 2×2 optical switches optically coupled between ... | 02/19/2008 |
| 7333687 | Dual-filter architecture for reduced dispersion Chromatic dispersion of thin-film based mux/demux and add/drop modules can be reduced. Thin-film devices can be arranged in a specific order in the module. Multiple kinds of filters are used to remove “even” and “odd” channels, or other divisions of channels... | 02/19/2008 |
| 7298943 | Monolithic optical component The present invention relates to a monolithic optical component (400) comprising a light-absorbing layer and a waveguide structure (2). The invention is more particularly adapted to a monolithic component (400) comprising an evanescent coupling ... | 11/20/2007 |
| 7298540 | Equalizing optical wavelength routers A dynamic equalizing optical channel router includes an input port for receiving a wavelength division multiplexed composite optical signal comprising a plurality of channels; at least one output port; a diffraction grating optically coupled to the input and output ... | 11/20/2007 |
| 7298466 | System and method for assembling optical components The proposed solution to the problems associated with assembling optical components introduces an angular alignment step and the use of collimated optical beams to the assembly process. One embodiment of a method for aligning optical components includes the steps of... | 11/20/2007 |
| 7298428 | Liquid crystal device and method for optical performance monitoring in fiber optic communication systems A liquid crystal optical performance monitor is described that employs a liquid crystal tunable filter for receiving a P-polarization beam and a rotated S-polarization beam from a C-polarizer. The rotated S-polarization beam from a birefringent crystal in C-polarize... | 11/20/2007 |
| 7292786 | Method and system for a re-configurable optical multiplexer, de-multiplexer and optical add-drop multiplexer A system for a re-configurable optical de-multiplexer, multiplexer or add/drop multiplexer is provided. A re-configurable de-multiplexer system comprises a wavelength selective switch having an input port, an output port and an internal port; a wavelength division d... | 11/06/2007 |
| 7286730 | Optical switch having angle tuning elements and multiple-fiber collimators An optical switch with a compact form factor includes a multiple-fiber collimator and an angle tuning element for deflecting an optical beam from an input fiber into one of at least two output fibers. The angle tuning element may be provided between a pair of coaxia... | 10/23/2007 |
| 7284914 | Structures for small form factor LiNbO3 optical modulator Small form factor package structures are disclosed for LiNbO3 optical modulator by reducing the package dimension for minimize the unused free space inside a modulator package. If a first aspect of the invention, the structure of the small form factor package for Li... | 10/23/2007 |
| 7280760 | Upgradeable optical add/drop multiplexer An OADM includes optical input and output; first and second bandpass filters with a first pass band, optically coupled to the optical input and output, respectively; third and fourth bandpass filters with a second pass band, optically coupled to reflection ports of ... | 10/09/2007 |
| 7257325 | Method and system for monitoring multiple optical communications lines The present invention provides a method and system for monitoring composite optical signals carried over plural fiber-optic lines within an optical network. Methods and systems in accordance with the present invention each utilize a single OPM to monitor each one of... | 08/14/2007 |
| 7257304 | Integrated optical device with reduced waveguide birefringence Techniques for reducing waveguide birefringence in an integrated planar lightwave circuit chip incorporating a plurality of different optical devices are described and claimed. Each optical device includes waveguides in which the waveguide cores are each disposed on... | 08/14/2007 |
| 7257287 | Optical interleaver In accordance with an exemplary embodiment of the present invention, an optical device includes an interleaver/deinterleaver, which includes a passive thermal compensator, wherein an optical signal which transverses the optical device undergoes substantially no temp... | 08/14/2007 |
| 7254306 | Optoelectronic component with curved waveguide with inwardly sloped sides The invention concerns semiconductor optoelectronic components with ribbon-shaped waveguide supported by a substrate. According to the invention the ribbon includes lateral sides and a light output face, characterized by said ribbon including a portion curved by mor... | 08/07/2007 |
| 7254291 | Optical interferometer One embodiment of an optical interferometer includes a first MMI device coupled to a second MMI device via a waveguide. The first MMI device separates a first signal into a guided portion and a diffused portion. The guided portion is transmitted to the second MMI de... | 08/07/2007 |
| 7245328 | Apparatus and method for controlling extinction ratio in a liquid crystal polarization controller optical switch A polarization controller includes: a liquid crystal cell; a mechanism for determining a compensation voltage; and a voltage driving circuit for applying the compensation voltage to the liquid crystal cell, where the application of the compensation voltage optimizes... | 07/17/2007 |
| 7236709 | Multi-input wavelocker for controlling laser wavelengths of multiple lasers Techniques for coupling output laser beams from multiple lasers into multiple fibers and using a collimating lens and a steering mirror to individually couple the laser beams from the fibers to a laser control system. ... | 06/26/2007 |
| 7236704 | Optical add/drop multiplexer utilizing variable optical attenuator A switchless optical add/drop module (OADM) includes: a first variable optical splitter (VOS) for splitting a composite optical signal including a plurality of channels into a first portion and a second portion; a first multi-channel variable optical attenuator (MCV... | 06/26/2007 |
| 7228014 | System for reducing the electrical return loss of a lithium niobate traveling wave optical modulator with low characteristic impedance An electro-optical modulator is disclosed that has a microwave input, chip with a thin film resistor or a lumped resistor located between an input RF connector and an RF electrode on a Lithium Niobate chip. The accessory connection chip has a broadband attenuator li... | 06/05/2007 |
| 7221818 | Optical switch The present invention relates to an optical switch. The optical switch includes at least two binary control elements movable between a first and second position. The binary control elements include an at least one angle tuning element for adjusting the pathway of an... | 05/22/2007 |
| 7218857 | Method, apparatus and system for a re-configurable optical add-drop multiplexer A re-configurable optical add/drop apparatus separates an optical input signal into a first signal having a plurality of channels and a second signal having a plurality of channels and includes a channel router with drop ports, a wavelength-selective channel attenua... | 05/15/2007 |
| 7200630 | Inverse fourier transform method, phase characterization method of optical components from transmission and group delay measurements as well as a system for performing the method A new method for characterizing the amplitude and phase distributions of the light propagating through arrayed-waveguide gratings is presented. The new method is based on the IFT. A very good agreement of the results obtained from the IFT method in comparison with O... | 04/03/2007 |
| 7196355 | Integrated thermal sensor for optoelectronic modules An optoelectronic module comprising at least one optical component placed on a support, said component comprising an active optical layer and at least one confinement layer which carries at least one electrical contact, wherein said module further comprises a therma... | 03/27/2007 |
| 7194167 | Method and apparatus for a fiber optic housing and aligning device The present invention discloses an apparatus and method for a fiber optic housing and aligning device. In one embodiment, a fiber optic housing and aligning device is provided. The device includes a housing having an opening in a wall thereof, the wall having a curv... | 03/20/2007 |
