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| Number | Title | Issue Date |
| 8184355 | Light modulation device A light modulation device capable of stabilizing a phase set in phase modulation processing and improving optical communication quality. A phase modulator is provided for each of plural branched input lights and performs phase modulation of the input light. A phase ... | 05/22/2012 |
| 8164819 | Photonic technique for generating arbitrary waveforms In a radio frequency (RF)-photonic arbitrary waveform generator (AWG), an optical carrier signal is phase-modulated using an arbitrary waveform optical phase generator (AWPOG), which may include, e.g., sequential optical phase modulators. The phase-modulated optical... | 04/24/2012 |
| 8134771 | Spatial light modulators with changeable phase masks for use in holographic data storage A holographic data storage system that includes a write head that includes a pixellated spatial light modulator and a separate or integral phase mask that varies the phase depending on the location in the phase mask that light passes through. The phase variation can... | 03/13/2012 |
| 8107154 | Optical modulator and optical signal generation apparatus An optical modulator includes, a first polarization separation and combination portion, a second polarization separation and combination portion, a first polarization plane-maintaining optical fiber, a second polarization plane-maintaining optical fiber, a third pol... | 01/31/2012 |
| 8089683 | Optical processing A modular routing node includes a single input port and a plurality of output ports. The modular routing node is arranged to produce a plurality of different deflections and uses small adjustments to compensate for wavelength differences and alignment tolerances in ... | 01/03/2012 |
| 8089684 | Photonic RF and microwave phase shifters Techniques and devices for tuning a phase shift of an RF or microwave signal by using an optical tuning mechanism based on photonic elements. ... | 01/03/2012 |
| 8077375 | Method and apparatus for generating 8-QAM-modulated optical signal A system and method for producing an 8-QAM-modulated signal are disclosed. The methodology, in an exemplary expedient, generally comprises splitting light from a CW laser into two parts; modulating the first part with a first signal and modulating the second part wi... | 12/13/2011 |
| 8049950 | Tunable zero-chirp pulse generator using plasma dispersion phase modulator An optical pulse generator comprising a phase modulator, wherein the phase modulator is configured to phase modulate and intensity modulate a continuous wave (CW) light signal in accordance with a received electrical signal, and an all-pass filter, the all-pass filt... | 11/01/2011 |
| 8009345 | Crystallization apparatus, crystallization method, device, and light modulation element A crystallization apparatus includes a light modulation element, and an image forming optical system that forms a light intensity distribution set based on light transmitted through the light modulation element on an irradiation surface. The crystallization apparatu... | 08/30/2011 |
| 7965435 | Method for controlling the phase of optical carriers in millimeter wave imaging systems using optical upconversion A system and method for locking the relative phase of multiple coherent optical signals, which compensates for optical phase changes induced by vibration or thermal changes in the environment. ... | 06/21/2011 |
| 7944598 | Speckle mitigation in laser scanner projector systems Laser scanner projection systems that reduce the appearance of speckle in a scanned laser image are provided. The laser projection system includes a visible light source having at least one laser, a scanning element and a system controller. The system controller is ... | 05/17/2011 |
| 7940449 | Compact display system A display system is based on a linear array phase modulator and a phase edge discriminator optical system. ... | 05/10/2011 |
| 7911675 | Optical modulation device and optical semiconductor device An optical modulation device includes: an optical splitter for splitting input light into a first input beam and a second input beam; an optical intensity modulator for modulating the intensity of the first input beam in response to a modulating signal; a variable o... | 03/22/2011 |
| 7907324 | Optical modulator and controlling method and apparatus thereof The optical modulator branches an input light into (2×N) lights in an optical branching section, and then phase modulates each of the branched lights in (2×N) phase modulating sections, and couples the phase modulated lights in an optical coupling section and gene... | 03/15/2011 |
| 7876491 | Multilevel optical phase modulator To take out monitor light unaffected by a multilevel optical phase-modulated component. For the purpose, a phase-shift unit that controls phases of plural (n, n is an integral number equal to or greater than 2) input lights, plural (n, n is an integral number equal ... | 01/25/2011 |
| 7791786 | Afocal beam steering system corrected for excess diffraction due to phase error from microelectromechenical mirror offsets An afocal beam system corrects excess diffraction from phase error in microelectromechanical mirror offsets. One invention aspect interposes an opposing phase difference, between rays reflected at adjacent mirrors, varying the difference with mirror angle to make it... | 09/07/2010 |
| 7782520 | Duobinary modulation with a lumped-element Mach-Zehnder device Duobinary and NRZ modulation of an X-Gb/s optical signal is achieved with a lumped element InP Mach-Zehnder device configured to operate at X/k-Gb/s where k>1 and arranged in a push-pull configuration. ... | 08/24/2010 |
| 7764417 | Adaptive optics systems using pixilated microelectromechanical systems (MEMS) An adaptive optics system is provided, comprising a spatial light modulator configured to modulate an incoming beam with an aberrated wavefront, a beamsplitter configured to receive the modulated beam from the spatial light modulator and to divide the modulated beam... | 07/27/2010 |
| 7755828 | Method for optical control of microwave phase A method and system for modifying the detected phase of a signal by driving a photodetector into saturation. This system and method differs from current manual and electrical microwave phase modification by using saturation means for modifying the phase. The system ... | 07/13/2010 |
| 7742217 | Image generation unit and method to use an image generation unit An image generation unit with an illumination unit for generating a plurality of coherent sub-beams and for illuminating an image modulator, including a light source, and a projection lens for superimposing each of the coherent sub-beams onto a projection screen pla... | 06/22/2010 |
| 7733556 | Optical devices with cascaded liquid crystal elements An optical beam processing device with two serially disposed birefringent elements, each element having its own direction of orientation. At least one element is pixelated with electrodes activated by control signals. The directions of orientation of the elements ar... | 06/08/2010 |
| 7733557 | Spatial light modulators with changeable phase masks for use in holographic data storage A holographic data storage system that includes a write head that includes a pixellated spatial light modulator and a separate or integral phase mask that varies the phase depending on the location in the phase mask that light passes through. The phase variation can... | 06/08/2010 |
| 7715084 | Retarder-based despeckle device for laser illumination systems A method and apparatus for reducing speckle in a laser illumination system uses a despeckle device including an optical retarder providing an odd integer multiple of substantially half-wave retardation for light emitted from a coherent laser in the laser illuminatio... | 05/11/2010 |
| 7697191 | Generation of a desired three-dimensional electromagnetic field The present invention relates to a method and a system for synthesizing a prescribed three-dimensional electromagnetic field based on generalized phase contrast imaging. Such a method and apparatus may be utilized in advanced optical micro and nano-manipulation, suc... | 04/13/2010 |
| 7612930 | Optical processing To operate an optical device comprising an SLM with a two-dimensional array of controllable phase-modulating elements groups of individual phase-modulating elements are delineated, and control data selected from a store for each delineated group of phase-modulating ... | 11/03/2009 |
| 7551342 | Optical frequency comb generator and optical modulator A resonance system (14, 15) is formed by a light incident side reflection mirror and a light exiting side reflecting mirror, arranged parallel to each other. The light incident on an incident side reflective mirror (14) is propagated in the outward pat... | 06/23/2009 |
| 7532384 | π-Phase shift device for light A phase shifter includes at least one photonic crystal structure having alternating high and low index dielectric layers. At least two defect structures are positioned between said photonic crystal structures. The defect structure includes one or more nonlinear mate... | 05/12/2009 |
| 7483195 | Optical substrate with modulated structure There is provided an optical substrate. The optical substrate includes at least one surface. The at least one surface includes at least one optical structure having a shape and dimensions, wherein the shape and dimensions of each optical structure represents in part... | 01/27/2009 |
| 7446925 | Micro-electromechanical light modulator with anamorphic optics Micro-electromechanical light modulators are combined with anamorphic and contrast enhancing optical elements to form optical display engines. Linear MEMS arrays are suitable for the étendue of low divergence light sources while handling high optical power for brig... | 11/04/2008 |
| 7440158 | Direct optical image projectors An apparatus includes a reconfigurable spatial light modulator, a light source, and a transmission filter. The reconfigurable spatial light modulator is capable of producing spatially varying amplitude and/or phase modulations of an incident light wavefront. The lig... | 10/21/2008 |
| 7440642 | Integrated optical modulator and method for manufacturing the same An integrated optical modulator and method for manufacturing thereof are disclosed. The integrated optical modulator comprises a carrier wave band modulator using a double sideband modulation method and an intermediate frequency band modulator using a single sideban... | 10/21/2008 |
| 7435939 | Dynamic optical phase shifter compensator A birefringent, electrically-controlled, wavelength selective, pixelated optical phase shifting device, in which the correct drive voltage for a desired phase shift through any pixel can be determined independently of changes in the drive voltage arising from change... | 10/14/2008 |
| 7412173 | Apparatus for generating optical carrier suppressed return-to-zero An apparatus for generating a Carrier-Suppressed Return-to-Zero (CS-RZ) signal is disclosed. The apparatus includes a mixer, a Low Pass Filter (LPF), a driver amplifier and a single external modulator. The mixer generates a modulator input by mixing data with a half... | 08/12/2008 |
| 7400436 | System for shifting at least one light spot The invention relates to a system for shifting at least one light spot (903), said system comprising: —a phase-modulator (906) for generating, from an input light beam, a light beam which is phase-modulated according to a controllable phase profile, ... | 07/15/2008 |
| 7400446 | Confocal microscope A confocal microscope uses fluorescent or reflected light obtained by irradiating a plurality of beam spots to a sample so as to observe the sample. The confocal microscope has a phase modulator element which modulates phase of laser light to form the beam spots, a ... | 07/15/2008 |
| 7397018 | Amplitude and phase controlled adaptive optics system An adaptive optics system is provided. The system includes a light source, a pair of deformable mirrors and a detection module. The light source is configured to provide an outgoing beam. The outgoing beam has an amplitude and a phase. The first deformable mirror is... | 07/08/2008 |
| 7382522 | Grooved substrate Various embodiments of a grooved substrate having electrical conductors and an electro optical material are disclosed. ... | 06/03/2008 |
| 7382512 | Resistivity phase change material Various devices and methods employing a resistive phase change material are disclosed. ... | 06/03/2008 |
| 7370972 | Two-dimensional image display device In a two-dimensional image display device, speckle noise is reduced by a simple construction. A two-dimensional image display device for displaying an image by projecting coherent light onto a projection plane is provided with at least one coherent light source (... | 05/13/2008 |
| 7362489 | Multi-conjugate liquid crystal tunable filter A hyper-spectral imaging filter has serial stages along an optical signal path with angularly distributed birefringent retarders and polarizers forming interference filters. The retarders can include tunable birefringent elements such as liquid crystals controlled i... | 04/22/2008 |
