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7585122 |
Aperture construction for a mobile camera
An adjustable aperture construction for a camera comprises at least two electrodes, and an electrical circuit for applying a voltage to the electrodes in order to create an electric field between...
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7548365 |
Semiconductor device and method comprising a high voltage reset driver and an isolated memory array
A method of operating a semiconductor device, a semiconductor device and a digital micromirror system are presented. In an embodiment, the semiconductor device comprises a grounded substrate, a...
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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...
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7539359 |
Systems and methods for chirp control of a dual arm Z-modulator to minimize dispersion effect of fiber plant
The present invention provides systems and methods for chirp control of a dual arm Z-modulator to minimize dispersion in the fiber plant. The chirp control is based upon a real-time control loop...
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7515324 |
System and method for resolving reset conflicts in a phased-reset spatial light modulator system
A system for, and method of resolving reset conflicts in a phased-reset SLM system and a projection visual display system incorporating the system or the method. In one embodiment, the system...
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7486897 |
Polarization duobinary optical transmitter
A polarization duobinary optical transmitter is disclosed. The transmitter includes a precoder for coding an electric signal and a light source for generating continuous light. The transmitter also...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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7024056 |
Electro-optic gating arrangement with improved duty cycle
The device includes an oscillator ( 1 ) to generate an electrical signal of a predetermined frequency and a signal divider ( 2 ) to split the electrical signal into first and second signals. The...
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6988804 |
Projector apparatus for preventing degradation in image quality due to heat
A projector apparatus includes a color separation optical system which separates illumination light into color light components, image forming panels illuminated with the color light components,...
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6987922 |
Method and apparatus for controlling a variable optical attenuator in an optical network
This invention describes a method for controlling attenuation for a variable optical attenuator (VOA) inserted in an optical path of an optical signal propagating in an optical network, comprising...
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6943930 |
Method and system for fabricating optical film using an exposure source and reflecting surface
An exposure system ( 5 ) for fabricating optical film ( 40 ) such as for photoalignment, where the optical film ( 40 ) has a photosensitive layer ( 20 ) and a substrate ( 10 ). The exposure system...
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6877858 |
Color projector apparatus having means for preventing degradation in image quality due to heat
Disclosed is a projector apparatus including a color separation optical system which separates illumination light into a plurality of color light components, a plurality of image forming panels...
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6801721 |
Polarization mode dispersion compensator for optical fiber communication systems
Optical infinite impulse response (IIR) filters are efficient polarization mode dispersion (PMD) compensators, requiring fewer stages than finite impulse response (FIR) filters. IIR filter...
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6775044 |
Wavelength compensation in a WSXC using off-voltage control
A tunable liquid crystal switch is disclosed. An electronic controller provides an electronic drive scheme for achieving low intra-channel crosstalk of less than −40 dB using only electronic...
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6762837 |
Polarization compensator and wavelength division multiplexing apparatus using same
In a polarization compensator for converting a polarization state of a lightwave, and a wavelength division multiplexing apparatus using same, a controller of the polarization compensator controls...
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6760141 |
Semiconductor optical modulator and semiconductor optical device
An electroabsorption semiconductor optical modulator includes a light absorption layer for generating a modulated light beam by absorbing an incident light beam. A well layer in the light...
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6744551 |
Method and apparatus for employing electrooptic materials subject to optical damage as a medium for control of light beam attributes using electrode-generated electric fields
A method and apparatus for dynamically controlling variation in an attribute of a light beam employing materials with unusually high electrooptical coefficients that are subject to optical damage...
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6724379 |
Multichannel driver circuit for a spatial light modulator and method of calibration
An apparatus and method for calibration of each individual driver channel in a multichannel driver circuit for a spatial light modulator used in an image display apparatus. A separate calibration...
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6590693 |
Light modulation
The present invention relates to a modulated light source, in particular for use as part of an opto-electronic communication network. The modulated light source has a laser and an external...
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6560003 |
Light receiving module and light receiving method with reduced polarization dependence
A light receiving module and a light receiving method to reduce polarization dependence, used in evaluation of polarization characteristics of various optical parts. The light receiving module has...
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6549320 |
Optical modulation device and projection display device utilizing the optical modulation device
An optical modulation device which can facilitate a reduction in size of a device and prevent overheating of the optical modulation device, and a projection display device utilizing the optical...
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6538787 |
Apparatus and method for polarization mode dispersion emulation and compensation
A polarization mode dispersion (PMD) emulator may include one or more modular “cells” that emulate PMD. Each of the cells may include optical delay and phase modulation components. The optical...
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6522449 |
Device for erasing overhead modulation of an optical signal
A device for erasing overhead modulation of an optical signal, wherein said optical signal is injected into an optical device able to modulate the optical signal (for example a semi-conductor...
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6515786 |
Bandwidth variable wavelength router and method of operation
An optical device comprises a first birefringent crystal having a first length, a second birefringent crystal having a second length, and a dynamic polarization rotator. An optical signal...
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6509983 |
System and method for adjusting recording laser beam polarization
Systems and methods for adjusting the polarization of one or more recording laser beams can correct (in whole or in part) for the changes in the polarization of the recording laser beam(s) caused...
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6498671 |
Regenerator with reconstitution of an optical signal carrier wave
An optical signal regenerator includes a mechanism for reconstituting an optical signal carrier wave. The optical signal is thus regenerated on the same wavelength as the incoming carrier wave.
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6421163 |
Two dimensional transform generator
A system that optically performs complex transforms, such as Fourier transforms. The system includes a pixel addressable spatial modulator that, in parallel, adjusts the phase of the light of each...
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6404531 |
Transverse electro-optic modulator
The invention relates to a transverse electro-optic modulator for modulating a light beam having a mean wavelength λ. The transverse electro-optic modulator includes at least one birefringent...
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6392780 |
Optical modulation device and projection display device utilizing the optical modulation device
An optical modulation device which can facilitate a reduction in size of a device and prevent overheating of the optical modulation device, and a projection display device utilizing the optical...
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6373614 |
High performance polarization controller and polarization sensor
The invention is an instrument for sensing the state of polarization (SOP), and for transforming the SOP of a beam of light from an incident continuously-varying arbitrary SOP to a desired exit...
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6339660 |
Device and method for writing on imaging material with an integrated waveguide
A device and a method is proposed for writing on imaging material ( 3 ) with a radiation source ( 1 ) producing an electromagnetic radiation having a wavelength suitable for recording image...
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6335816 |
Pockels cell and optical switch with pockels cell
Dual Pockels cell containing: a bar ( 112 ) in electro-birefractive material having a first ( 122 ) and a second ( 124 ) end, a first and a second ring electrode ( 126, 128 ) deposited at the ends...
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6282010 |
Anti-reflective coatings for spatial light modulators
A spatial light modulator with an anti-reflective coating (ARC) 100 integrated into its structure. The manufacturing of the device is altered to include deposition of an ARC 100, and any necessary...
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6233084 |
Optical display system including an achromatized ferroelectric light valve
An optical display system includes a source of white uncollimated light, a color separator for separating the white light into spectral components, a reflective ferroelectric light valve for...
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6229606 |
Method and apparatus for measuring PMD of a dispersion compensation grating
A method, a system and a computer program product configured to determine a differential group delay of two sequential optical beams based on a frequency dependence of a length of an optical path...
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6198560 |
Operation of optical modulators
A method of, and an apparatus for, operating an optical modulator employ an optical attenuation versus voltage response which is cyclic and which includes an input to which the application of a...
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6172791 |
Electro-optic modulators
The specification describes a Mach-Zehnder electro-optic modulator device in which the ridge containing the waveguides in the interactive electro-optic regions have re-entrant sidewalls. This...
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6166837 |
WDM system for reduced SBS
A tunable semiconductor laser comprises a gain section having an MQW active region, a uniform pitch grating DFB region, and first waveguide. A composite reflector, including a second MQW region and...
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6144427 |
Polymer dispersed liquid crystal panel
A liquid crystal display device comprises a reflective type liquid crystal panel with pixels which are arranged in two-dimentionally and which modulate irradiated light utilizing polymer dispersed...
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5781327 |
Optically efficient high dynamic range electro-optic modulator
An electro-optic modulator and a method for its use, in which an optical carrier is effectively suppressed for transmission of a radio-frequency (rf) modulating signal over an optical communication...
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5742268 |
Optical modulation device having bias reset means
An optical modulation device comprises an optical modulator in which the operating point is varied according to a bias voltage. A phase deviation of an operating point from a selected optimal...
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