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| Number | Title | Issue Date |
| 8169682 | Light modulator for representing complex-valued data A light modulator is disclosed for representing complex-valued data, comprising an encoding area that has an arrangement of pixels, the phase of which can be controlled. This largely avoids an interfering optical path difference between adjacent pixels or pixel grou... | 05/01/2012 |
| 7542194 | Birefringence-compensated liquid crystal display and projection system using same A projection system includes an image-forming device and a polarizing beamsplitter. Illumination light illuminates the image-forming device via the first polarizing beamsplitter. A retardation element is disposed between the image-forming device and the polarizing b... | 06/02/2009 |
| 7369290 | Modulator bias control Approaches to bias control are disclosed for an optical modulator that modulates an optical carrier with a data input signal. In one embodiment an electrical bias input signal provided to the modulator is adjusted based on a characteristic of the data input signal d... | 05/06/2008 |
| 7365905 | Collimated optical system An optical system provides a lens cell having a generally cylindrical lens cell body and an optical lens system therein. The lens cell body has a lens cell central longitudinal axis and a lens cell optical axis, eccentrically offset from the lens cell central longit... | 04/29/2008 |
| 7359582 | Method based on stokes parameters for the adaptive adjustment of PMD compensators in optical fiber communication systems and compensator in accordance with said method A method for the adaptive adjustment of a PMD compensator in optical fiber communication systems with the compensator comprising a cascade of adjustable optical devices through which passes an optical signal to be compensated and comprising the steps of computing th... | 04/15/2008 |
| 7355776 | Acoustic damping material for electro-optic materials An acoustic damping material for electro-optic material has an adhesive material combined with a ceramic crystalline material such that the acoustic impedance of the combined adhesive material and the ceramic crystalline material is substantially the same as the aco... | 04/08/2008 |
| 7339714 | Variable blazed grating based signal processing A light processing system includes an array of optical signal processing devices. The array of processing devices are operable to receive at least some of a first signal part and to modulate the first signal part based at least in part on a control signal received f... | 03/04/2008 |
| 7330611 | Method and apparatus for enhancing the extinction ratio in mode converters A method and apparatus for optimizing a non-ideal, real mode converter to substantially achieve the performance of an ideal mode converter. The method consists of optimizing the input linear polarization to the mode converter to balance the power in the principal mo... | 02/12/2008 |
| 7290328 | Method of manufacturing optical modulator Major surface of a substrate having an optical waveguide and a modulation electrode is pasted to a base substrate through a thermosetting resin, and then the rear surface of the substrate is machined thus making thin the entirety. Subsequently, the rear surface of t... | 11/06/2007 |
| 7289688 | Passive method and apparatus for inducing mode conversion A waveguide for use in polarization mode converters and polarization modulators using extrinsic strain to prerotate the principal axes and control birefringence is disclosed herein. The invention relates to the orienting of principal propagation axes in an optical w... | 10/30/2007 |
| 7286764 | Reconfigurable modulator-based optical add-and-drop multiplexer An optical add and drop multiplexer system comprising a first module for providing a first signal; a second module for providing a second signal; and a modulator for receiving a channel of the first signal at a first location, the first location configured to actuat... | 10/23/2007 |
| 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 |
| 7242476 | Alignment measuring system and method of determining alignment in a photolithography process An alignment measuring system includes a focusing diode, a light source, an image sensor, first and second splitters, and a controller. The first splitter directs a portion of light from the light source toward a wafer, and directs light returned by the wafer to the... | 07/10/2007 |
| 7236287 | Pockels cell The invention relates to a pockels cell comprising two spaced-apart cubical RTP crystals that have a square cross section, are located one behind another, and are oriented towards each other so as to provide thermal compensation in the direction of radiation. Each o... | 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 |
| 7228025 | Thin film interleaver A thin film interleaver device is disclosed. The thin film interleaver includes thin film optics. The thin film(s) are formed such that they reflect one group of wavelengths while allowing a second group of wavelengths to pass through the thin film(s). The thin film... | 06/05/2007 |
| 7224909 | Method and system for selective optical payload cancellation The invention provides a method and system for selectively canceling a specified frequency band in the payload of an optical communication system. This selected frequency band is to be used for launching pilot tones for power measurement and identification. The meth... | 05/29/2007 |
| 7221495 | Thin film precursor stack for MEMS manufacturing This invention provides a precursor film stack for use in the production of MEMS devices. The precursor film stack comprises a carrier substrate, a first layer formed on the carrier substrate, a second layer of an insulator material formed on the first layer, and a ... | 05/22/2007 |
| 7218800 | Compensator for polarization-mode dispersion compensation A compensator for compensating polarisation-mode dispersion, comprises a splitter (30) arranged to split light, according to the light's polarisation, between a first optical path and a second optical path; a combiner (40) arranged to combine light fro... | 05/15/2007 |
| 7187487 | Light modulator with a light-absorbing layer A spatial light modulator includes a first region and a second region. A light-absorbing layer contacts at least a portion of the second region. The light absorbing layer includes a first layer and a second layer, the second layer having a reflectivity less than abo... | 03/06/2007 |
| 7184201 | Digital micro-mirror device having improved contrast and method for the same According to one embodiment of the present invention, a digital micro-mirror device having improved contrast and a method for the same are provided. The digital micro-mirror device includes a plurality of current-carrying conductors on an upper surface of a substrat... | 02/27/2007 |
| 7177081 | High contrast grating light valve type device A grating light valve has with a plurality of spaced reflective ribbons are spatially arranged over a substrate with reflective surfaces. The grating light valve is configured to optimized the conditions for constructive and destructive interference with an incident... | 02/13/2007 |
| 7136211 | Display device with non-linear ramp In some embodiments, a drive circuit may be coupled to a spatial light modulator, wherein the drive circuit provides a non-linear analog ramp signal to the spatial light modulator. Other embodiments are disclosed and claimed. ... | 11/14/2006 |
| 7123406 | Reflective semiconductor optical amplifier light source A reflective semiconductor optical amplifier light source is disclosed. The reflective semiconductor optical amplifier light source includes a transmissive type semiconductor optical amplifier for creating and amplifying spontaneous emission light, a reflector for r... | 10/17/2006 |
| 7106764 | High-repetition-rate passively mode-locked solid-state laser A passively mode-locked solid-state laser is designed to emit a continuous-wave train (51, 52) of electromagnetic-radiation pulses, the fundamental repetition rate of the emitted pulses exceeding 1 GHz, without Q-switching instabilities. The laser includes an... | 09/12/2006 |
| 7106512 | Wavelength selective switching device and method for selectively transmitting optical signals based on wavelength A wavelength selective switching device and method for selectively transmitting optical signals based on wavelength utilizes diffraction to spatially separate the optical signals of different wavelengths such that the optical signal of a selected wavelength can be s... | 09/12/2006 |
| 7103286 | Method and system for optimizing the pulse form of an amplitude modulated optical signal The influences on transmission quality caused by chirp and self-phase modulation are at least largely corrected by way of an optimally set operating point of the modulator (2). Suitable criteria are obtained in control loops in order to maintain the optimal s... | 09/05/2006 |
| 7097306 | Projection device and liquid crystal panel unit for use in the projection device A projection device includes on a chassis a liquid crystal panel for irradiation with light from a light source, a polarizing plate opposing the liquid crystal panel, and an optical compensation sheet provided between the liquid crystal panel and the polarizing plat... | 08/29/2006 |
| 7085052 | Over-parameterized polarization controller A controller, particularly for setting a desired or randomized polarization state of an output light beam derived from an input, has more than the minimum number of controllable optical elements needed to determine the state of the output. The controller applies con... | 08/01/2006 |
| 7081996 | Isolated polarization beam splitter and combiner An isolated polarization beam splitter or combiner, for joining light from different inputs into one common port, and for dividing a beam of light into orthogonal polarizations. In both modes of operation, the splitter/combiner provides isolation preventing transmis... | 07/25/2006 |
| 7072113 | Wavelength selective switching device and method for selectively transmitting optical signals based on wavelength A wavelength selective switching device and method for selectively transmitting optical signals based on wavelength utilizes diffraction to spatially separate the optical signals of different wavelengths such that the optical signal of a selected wavelength can be s... | 07/04/2006 |
| 7068372 | MEMS interferometer-based reconfigurable optical add-and-drop multiplexor The interferometer comprises a beam splitter, a mirror and a phase modulator. The beam splitter splits a signal into a first portion and a second portion. The mirror reflects the first portion. The first portion includes an optical path length, which is fixed. The p... | 06/27/2006 |
| 7065302 | High efficiency optical feedback modulator and method of operation A high efficiency optical feedback modulator and method of operation are provided. The high efficiency optical feedback modulator (30) includes an optical modulator (52) and an optical feedback system (54). The optical modulator (52) incl... | 06/20/2006 |
| 7057819 | High contrast tilting ribbon blazed grating The light modulator includes elongated elements and a support structure coupled to the elongated elements. Each element includes one or more lengthwise slits within an active optical area, and a light reflective planar surface with the light reflective planar surfac... | 06/06/2006 |
| 7054515 | Diffractive light modulator-based dynamic equalizer with integrated spectral monitor An integrated device of the present invention comprises free-space optics, a bi-directional multiplexor/de-multiplexor, a diffractive light modulator, a beam splitter, an optical performance monitor, and a controller. The free-space optics collimate, transform and i... | 05/30/2006 |
| 7050214 | Optical compensation element The invention relates to an optical compensation element comprising a first transparent surface on which a transparent electrode is arranged; a second transparent surface on which a plurality of transparent main electrodes are arranged, several of which being respec... | 05/23/2006 |
| 7049164 | Microelectronic mechanical system and methods The current invention provides for encapsulated release structures, intermediates thereof and methods for their fabrication. The multi-layer structure has a capping layer, that preferably comprises silicon oxide and/or silicon nitride, and which is formed over an et... | 05/23/2006 |
| 7042611 | Pre-deflected bias ribbons A modulator for and a method of modulating an incident beam of light including means for supporting a plurality of active elements and a plurality of bias elements, each active and bias element including a light reflective planar surface with the light reflective pl... | 05/09/2006 |
| 7027473 | Multimode semiconductor laser module, wavelength detector, wavelength stabilizer, and Raman amplifier The present invention provides a multimode semiconductor laser module. The module comprises a multimode laser element 34, an optical filter 54, a light-receiving element 52 and a temperature regulator 24. Multimode light from the laser el... | 04/11/2006 |
| 7027202 | Silicon substrate as a light modulator sacrificial layer An optical MEM device is fabricated with a patterned device layer formed on a silicon wafer. Preferably, the patterned device layer is patterned with plurality of ribbons and/or access trenches. The central portion of the ribbon is released from the silicon wafer us... | 04/11/2006 |
