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公开(公告)号：US12184029B2
公开(公告)日：2024-12-31
申请号：US17483231
申请日：2021-09-23
Applicant: Shanxi University
Inventor： Kuanshou Zhang , Jingke Sun , Jinxia Feng , Yuanji Li , Zhenyu Jiang
Abstract: An integral optical resonant cavity for frequency conversion is provided. The integral optical resonant cavity includes: a housing, a cavity-length adjustment device, a temperature control device and a nonlinear crystal provided in the temperature control device; a first plano-concave mirror and a second plano-concave mirror included in the cavity-length adjustment device and a nonlinear crystal form the optical resonant cavity; and light passes through the first plano-concave mirror, the nonlinear crystal and the second plano-concave mirror sequentially. The stability of the length of the optical resonant cavity is improved through an integral design thereof, and the stability of the temperature of the nonlinear crystal in the integral optical resonant cavity is improved through the temperature control device, thereby stably controlling relative phases between light fields for the frequency conversion in the resonant cavity. Meanwhile, the length of the integral optical resonant cavity is accurately controlled through the cavity-length adjustment device.
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公开(公告)号：US12015236B2
公开(公告)日：2024-06-18
申请号：US17382350
申请日：2021-07-22
Applicant: National Tsing Hua University
Inventor： Yen-Chieh Huang
CPC classification number: H01S3/0903 , H01S3/0635 , H01S3/0675 , H01S3/108 , H01S3/0637
Abstract: A dielectric-grating waveguide free-electron laser device generating coherent or laser-like radiation is provided. An electron beam propagates next to a dielectric waveguide with a built-in grating structure to generate highly confined coherent or laser-like radiation in the waveguide through the Bragg resonance, the backward-wave resonance, or the Fabry-Perot resonance provided by the grating-waveguide structure. The dielectric-grating waveguide can be made of linear optical materials or nonlinear optical materials or combination of linear and nonlinear optical materials to enable versatile functionalities, such as laser generation, laser-wavelength conversion, and laser signal processing. Owing to the build-up of the laser modes inside the dielectric waveguide, coherent or laser-like Smith-Purcell radiation is also generated above the grating via coupling and bunching of the electrons with the surface mode fields.
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公开(公告)号：US11831122B2
公开(公告)日：2023-11-28
申请号：US17902406
申请日：2022-09-02
Applicant: BNNT, LLC
Inventor： R. Roy Whitney , David R. Douglas , Henry P. Freund , George R. Neil
CPC classification number: H01S3/08 , H01S3/0903 , H01S3/2308
Abstract: Orbital debris removal (ODR) systems under the present approach may use a ground- or surface-based FEL and mirror system with sufficient power and both spatial and temporal resolution to both locate Category II OD (1 cm to 10 cm diameter) in low Earth orbit (LEO, 160 to 2000 km altitude) and remove these objects from orbit. Locating the Category II OD is performed by having the light beam from an FEL and its beam director scan a volume of space of interest and then observing the light reflected from the OD. Removing the OD may include heating the OD to a sufficiently high temperature to evaporate the OD, changing the orbit of the OD such as to lower the perigee, or both. Megawatt-class MOPA FELs for, inter alia, removing OD, are described.
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公开(公告)号：US11656324B2
公开(公告)日：2023-05-23
申请号：US17888865
申请日：2022-08-16
Applicant: AGENCY FOR DEFENSE DEVELOPMENT
Inventor： Yong Gi Jo , Taek Jeong , Jung Hyun Kim , Duk Young Kim , Yong Sup Ihn , Zae Ill Kim , Su Yong Lee
IPC: G01S7/03 , G01S13/86 , H01S3/09 , H01S3/00 , H01L31/0352
CPC classification number: G01S7/03 , G01S13/865 , H01L31/0352 , H01S3/0057 , H01S3/09
Abstract: Provided is a method of generating a squeezed quantum illumination light source, including generating a dual mode squeezed light source including a signal mode and an idler mode, obtaining a degree of additional squeezing for the dual mode squeezed light source based on object information, determining a squeezing angle and a degree of operation that satisfy the degree of additional squeezing for each of the signal mode and the idler mode, and squeezing the dual mode squeezed light source based on the squeezing angle and the degree of operation, and provided is a quantum radar device using the squeezed quantum illumination light source.
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公开(公告)号：US11581693B2
公开(公告)日：2023-02-14
申请号：US16582478
申请日：2019-09-25
Applicant: PHOTONIC TECHNOLOGIES (SHANGHAI) CO., LTD.
Inventor： Shenglong Zhuo , Patrick Yin Chiang
Abstract: The disclosure relates to a pulsed laser driver that utilizes a high-voltage switch transistor to support a high output voltage for a laser, and a low-voltage switch transistor that switches between an ON state and an OFF state to generate a pulsed current that is supplied to the laser to generate an output pulsed laser signal. The pulsed laser driver switches the low-voltage switch transistor between the ON state and the OFF state according to an input pulsed signal such that the output pulsed laser signal is modulated according to the input pulsed signal. The pulsed laser driver also utilizes a feedback control module to control the gate terminal voltage of the high-voltage switch transistor to improve the precision of the output pulsed laser signal.
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Patent Agency Ranking
公开(公告)号：US20220284335A1
公开(公告)日：2022-09-08
申请号：US17746544
申请日：2022-05-17
Applicant: IONQ, INC.
Inventor： Yunseong NAM , Reinhold BLUMEL , Nikodem GRZESIAK
Abstract: A method of performing a computation using a quantum computer includes generating a plurality of laser pulses used to be individually applied to each of a plurality of trapped ions that are aligned in a first direction, each of the trapped ions having two frequency-separated states defining a qubit, and applying the generated plurality of laser pulses to the plurality of trapped ions to perform simultaneous pair-wise entangling gate operations on the plurality of trapped ions. Generating the plurality of laser pulses includes adjusting an amplitude value and a detuning frequency value of each of the plurality of laser pulses based on values of pair-wise entanglement interaction in the plurality of trapped ions that is to be caused by the plurality of laser pulses.
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公开(公告)号：US20220247145A1
公开(公告)日：2022-08-04
申请号：US17616475
申请日：2021-03-24
Applicant: SHENZHEN INTELA LASER TECHNOLOGY CO., LTD.
Inventor： Fei CHEN , Xiyue SHI , Long HUANG , Xinxing WANG
IPC: H01S3/09
Abstract: A laser light source control system includes a master control board, a driver control board, a light source driver board, and an operator control unit. The master control board is provided with a master control unit, a first driver board interface and a laser driver unit. The driver control board is provided with a driver control unit and a constant current board interface. The light source driver board is provided with a light source driver unit. The operator control unit monitors a state of the laser tube and acquire control information of the laser tube. The master control unit outputs the control signal through the laser driver unit. The driver control unit receives the control signal through the first driver board interface, and outputs a conversion signal. The light source driver unit receives the conversion signal through the constant current board interface to drive the laser tube for corresponding display.
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公开(公告)号：US20220039247A1
公开(公告)日：2022-02-03
申请号：US17385270
申请日：2021-07-26
Applicant: Technische Universität Darmstadt
Inventor： Uwe NIEDERMAYER
Abstract: An apparatus for guiding, in particular directing or accelerating, charged particles (50), comprising: a substrate (110) having a surface (115); an optically thinner layer (120) formed on the surface (115); an inhomogeneous channel (130) which is formed by two mutually opposite delimiting structures on a side of the layer (120) that is opposite the substrate (110); and a radiation device which is designed to generate at least one pulsed laser beam (140) and inject the at least one pulsed laser beam (140) into the channel (130) from a side that is opposite the optically thinner layer (120). The layer (120) for the laser beam (140) is optically thin, and the delimiting structures have a high optical density in comparison with the layer (120). The delimiting structures are designed to guide the particles (50) by means of the laser beam (140) in the channel (130) and alternatingly focus them along the channel (130) and in at least one direction perpendicular to the channel (130).
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9.发明授权公开(公告)号：US11133641B1
公开(公告)日：2021-09-28
申请号：US17335624
申请日：2021-06-01
Applicant: Nanjing University
Inventor： Xinglong Wu , Run Yang , Yixian Wang , Jiancang Shen
IPC: H01S3/30 , H01S4/00 , H01S3/094 , H01S3/0943 , H01S3/08 , H01S3/091 , H01S3/108 , H01S5/22 , G01N21/65 , H01S3/09 , H01S5/042
Abstract: Disclosed is a terahertz laser device based on phonon vibration excitation, including a resonant cavity composed of a hollow waveguide made of a composite film and optical lenses at both ends of the waveguide, where M represents nano-metal particles. A zinc oxide mesomorphic microsphere is used herein as a source, symmetric stretching vibration of nanosheets on the zinc oxide microsphere is excited and induced by a laser and is transmitted through elastic and electric coupling among the nanosheets, and a terahertz wave with a frequency of 0.36 THz is radiated by means of phonon vibration; moreover, the zinc oxide mesomorphic microspheres and the nano-metal particles are mixed evenly to produce a strong local electric field a few nanometers nearby a surface of the metal particle by taking advantage of a surface-enhanced Raman effect of the nano-metal particles, a nanocantilever of the ZnO mesomorphic microsphere is greatly changed in polarizability with ample contact of the nano-metal particles and the ZnO mesomorphic microspheres, and thus the terahertz radiation power thereof is enhanced.
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公开(公告)号：US11081852B2
公开(公告)日：2021-08-03
申请号：US15495245
申请日：2017-04-24
Applicant: Cymer, LLC
Inventor： Yingbo Zhao , Kevin O'Brien
Abstract: A laser system's laser light energy control and resulting dose control is improved by creating and using a set of gain estimators, one for each of a set or range of laser light pulse repetition rates. When a new repetition rate is used, its corresponding gain estimator is retrieved, used to compute the voltage to fire the laser source, and updated. The resulting generated laser light thereby avoids the convergence delay inherent in prior laser systems and, further, can repeatedly do so with subsequent specified repetition rates.
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