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公开(公告)号：US20230375862A1
公开(公告)日：2023-11-23
申请号：US18363489
申请日：2023-08-01
Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.
Inventor： Weiwei Song , Stefan Rusu , Chan-Hong Chern , Chih-Chang Lin
CPC classification number: G02F1/025 , G02F1/2255 , G02F1/2257 , G02F2201/508 , G02F2201/58
Abstract: A semiconductor device include: a first bus waveguide; a first silicon ring optically coupled to the first bus waveguide; a backup silicon ring optically coupled to the first bus waveguide; a first heater and a second heater configured to heat the first silicon ring and the backup silicon ring, respectively; and a first switch, where the first switch is configured to electrically couple the first silicon ring to a first radio frequency (RF) circuit when the first switch is at a first switching position, and is configured to electrically couple the backup silicon ring to the first RF circuit when the first switch is at a second switching position.
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公开(公告)号：US11815696B1
公开(公告)日：2023-11-14
申请号：US16997601
申请日：2020-08-19
Applicant: Xanadu Quantum Technologies Inc.
Inventor： Krishnakumar Sabapathy , Haoyu Qi , Joshua Abe Izaac , Christian Weedbrook , Daiqin Su , Casey Myers
CPC classification number: G02B27/0927 , G02F1/0121 , G02F2201/58
Abstract: An apparatus includes an optical circuit having at least one reconfigurable beamsplitter and is configured to receive a plurality of input optical modes in a Gaussian state and generate a plurality of output optical modes. The apparatus also includes at least one detector optically coupled with the optical circuit and configured to perform a non-Gaussian measurement of a first output optical mode from the plurality of output optical modes. The non-Gaussian measurement of the first output optical mode is configured to cause a second output optical mode from the plurality of output optical modes to be in a first non-Gaussian state. The apparatus also includes a controller operatively coupled to the optical circuit and configured to change a setting of the at least one reconfigurable beamsplitter to cause the second output optical mode from the plurality of output optical modes to be in a second non-Gaussian state.
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公开(公告)号：US20230341627A1
公开(公告)日：2023-10-26
申请号：US17729031
申请日：2022-04-26
Applicant: GlobalFoundries U.S. Inc.
Inventor： Michal Rakowski , Vaibhav A. Ruparelia , Riddhi Nandi , Prateek K. Sharma , Avijit Chatterjee , Vasudeva Reddy KuppiReddy , Indranil Som
CPC classification number: G02B6/2934 , G02B6/12026 , G02F2201/58 , H01S3/083
Abstract: Disclosed is a thermal stabilization circuit including a heater, which is adjacent and thermally coupled to a closed-curve waveguide of an optical ring resonator, and an analog feedback circuit, which includes a fully autonomous analog feedback loop from a drop port of a bus waveguide of the optical ring resonator to the heater. This analog feedback circuit is configured to dynamically control the electrical power provided to the heater and, thereby to dynamically control the thermal output of the heater in order to tune the ring resonance wavelength to the operating laser wavelength. The analog feedback circuit is further configured to be independent of input power, to be power efficient, to have a relatively small footprint, to have a tunable time constant and to facilitate adjustable wavelength locking. Also disclosed is a device (e.g., a ring-based transceiver or the like), which includes multiple optical ring resonators and corresponding thermal stabilization circuits.
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144.发明申请公开(公告)号：US20190162999A1
公开(公告)日：2019-05-30
申请号：US15827204
申请日：2017-11-30
Applicant: Palo Alto Research Center Incorporated
Inventor： Alex Hegyi
CPC classification number: G02F1/1395 , G01J3/28 , G01J3/2823 , G01J3/447 , G01J3/45 , G01J3/4531 , G01J4/04 , G01J2003/2866 , G02B5/3083 , G02B27/286 , G02F1/1326 , G02F1/13306 , G02F1/13318 , G02F1/133528 , G02F2201/58 , G02F2203/62
Abstract: A liquid-crystal variable retarder has first and second liquid-crystal cells with respective first and second thicknesses, the second thickness being less than the first thickness. A feedback sensor provides a feedback signal indicative of a retardance of the liquid-crystal variable retarder. A controller is coupled to the feedback sensor and the first and second liquid-crystal cells. The controller is operable to apply a first signal to the first liquid-crystal cell based on a target retardance trajectory and a feedforward control model. The controller applies a second signal to the second liquid-crystal cell based on the feedback signal and the target retardance trajectory.
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145.发明申请公开(公告)号：US20190155125A1
公开(公告)日：2019-05-23
申请号：US16190838
申请日：2018-11-14
Applicant: NATIONAL TSING HUA UNIVERSITY
Inventor： Ming-Chang CHEN , Hung-Wei SUN , Pei-Chi HUANG
IPC: G02F1/35
CPC classification number: G02F1/3544 , G02F1/3501 , G02F1/353 , G02F2001/3503 , G02F2001/354 , G02F2201/58
Abstract: A method and system for utilizing the laser defocusing effect for phase matching of high order harmonic generation in a tight focusing geometry are provided. The most suitable focusing geometry, especially those five parameters including: (1) the aperture size of the adjustable iris, (2) the focus position with respect to the gas cell, (3) the backing pressure of the gas cell, (4) the focal length and (5) the length of the gas cell, for achieving phase matching of the target harmonic order and maximal yield of the target harmonic order are disclosed.
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Patent Agency Ranking
146.发明申请公开(公告)号：US20190041670A1
公开(公告)日：2019-02-07
申请号：US16050347
申请日：2018-07-31
Applicant: Fujitsu Optical Components Limited
Inventor： Masaki SUGIYAMA
IPC: G02F1/01
CPC classification number: G02F1/0147 , G02F2201/58 , G02F2203/055
Abstract: A tunable light source includes a substrate; a light source; a wavelength selecting device that selects, according to a control signal, output light with a specific wavelength from light output from the light source; a wavelength filter that is disposed on the substrate, filters the output light, and outputs the filtered light; a light-receiving device that receives the filtered light from the wavelength filter; and a controller configured to generate the control signal based on an output transmittance corresponding to a quantity of the received light received by the light-receiving device, a first transmittance corresponding to a target wavelength, a second transmittance corresponding to a shorter-wavelength limit of a control range including the target wavelength, and a third transmittance corresponding to a longer-wavelength limit of the control range, and output the generated control signal to the wavelength selecting device.
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公开(公告)号：US20180330681A1
公开(公告)日：2018-11-15
申请号：US15966251
申请日：2018-04-30
Applicant: Japan Display Inc.
Inventor： Tae KUROKAWA
IPC: G09G3/36 , G02F1/1339 , G02F1/133 , G02F1/1368 , F21V8/00
CPC classification number: G09G3/3607 , G02B6/0068 , G02B6/0076 , G02F1/13318 , G02F1/1339 , G02F1/1368 , G02F2201/58 , G02F2203/01 , G02F2203/34 , G09G2320/0271 , G09G2320/064 , G09G2320/0666 , G09G2360/144
Abstract: According to an aspect, a display device includes: a first translucent substrate; a second translucent substrate facing the first translucent substrate; a liquid crystal layer including polymer dispersed liquid crystal sealed between the first and second translucent substrates; at least one light emitter facing at least one of side surfaces of the first and the second translucent substrates; and a display controller. The display controller includes: an external light analyzer setting, in accordance with a received signal of external light information, a second color gamut different from a first color gamut displayable when the external light is not present; and a signal adjuster converting in color a first pixel input signal into a second pixel input signal that reduces a color shift of a second reproduced color in the second color gamut from a first reproduced color in the first color gamut in accordance with the first pixel input signal.
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公开(公告)号：US20180292680A1
公开(公告)日：2018-10-11
申请号：US15481971
申请日：2017-04-07
Applicant: Elenion Technologies, LLC
Inventor： Thomas Wetteland Baehr-Jones , Matthew Akio Streshinsky , Yang Liu , Michael J. Hochberg , Ran Ding , Alexei Tager
CPC classification number: G02B6/4207 , G02B6/125 , G02B2006/12142 , G02F1/011 , G02F1/0147 , G02F2201/38 , G02F2201/58 , G02F2203/50
Abstract: Back scattering in an optical waveguide at an operating wavelength is controlled by adjusting an optical phase of light propagating in the waveguide at one or more locations along the waveguide. A portion of the back scattered light is tapped off near an input port and coupled into a photodetector. A controller detects changes in the photodetector signal and adjusts an optical phase tuner configured to control the optical phase of light in the waveguide at the selected location or locations. The optical phase tuner may be configured to vary the refractive index of at least a portion of the waveguide.
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公开(公告)号：US20180259797A1
公开(公告)日：2018-09-13
申请号：US15974313
申请日：2018-05-08
Applicant: Oracle International Corporation
Inventor： Philip Amberg , Eric Y. Chang , Frankie Y. Liu
CPC classification number: G02F1/0121 , G02F1/025 , G02F1/3132 , G02F2201/58 , G02F2203/15
Abstract: In an optical device, a ring-resonator modulator, having an adjustable resonance (center) wavelength, receives an optical signal that includes a carrier wavelength from an input-output optical waveguide. Then, a monitoring mechanism monitors a performance metric (such as an average power or a signal swing) of a monitor optical signal from the ring-resonator modulator. Moreover, control logic in the optical device adjusts the resonance wavelength based on the monitored performance metric so that the resonance wavelength is locked to the carrier wavelength. In particular, the control logic may apply a change to an adjustment signal that is provided to the ring-resonator modulator. If the change increases the performance metric, the control logic may continue to modify the resonance wavelength. Otherwise, the control logic may modify the resonance wavelength by applying one or more changes, having an opposite sign to the change, to the adjustment signal.
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公开(公告)号：US09989785B2
公开(公告)日：2018-06-05
申请号：US14463654
申请日：2014-08-19
Applicant: Oracle International Corporation
Inventor： Philip Amberg , Eric Y. Chang , Frankie Y. Liu
CPC classification number: G02F1/0121 , G02F1/025 , G02F1/3132 , G02F2201/58 , G02F2203/15
Abstract: In an optical device, a ring-resonator modulator, having an adjustable resonance (center) wavelength, receives an optical signal that includes a carrier wavelength from an input-output optical waveguide. Then, a monitoring mechanism monitors a performance metric (such as an average power or a signal swing) of a monitor optical signal from the ring-resonator modulator. Moreover, control logic in the optical device adjusts the resonance wavelength based on the monitored performance metric so that the resonance wavelength is locked to the carrier wavelength. In particular, the control logic may apply a change to an adjustment signal that is provided to the ring-resonator modulator. If the change increases the performance metric, the control logic may continue to modify the resonance wavelength. Otherwise, the control logic may modify the resonance wavelength by applying one or more changes, having an opposite sign to the change, to the adjustment signal.
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