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公开(公告)号：US12080988B2
公开(公告)日：2024-09-03
申请号：US17182527
申请日：2021-02-23
CPC分类号： H01S3/1307 , H01S3/0078 , H01S3/0085 , H01S3/10046 , H01S3/107 , H01S3/1118 , H01S3/1304 , H01S3/1305 , H01S3/1306 , H01S3/1312 , H01S2301/02 , H04B2210/006
摘要： A photonic-based microwave generator includes a mode-locked laser that generates an optical pulse train, a feedback photodiode that samples the optical pulse train, and a servo amplifier that processes the photodiode output into a servo signal. The servo signal controls the mode-locked laser to suppress relative intensity noise on the optical pulse train. The microwave generator may also include a microwave photodiode for converting the optical pulse train into a microwave signal. The microwave generator may also include a second servo amplifier that processes a low-frequency output of the microwave photodiode into a second servo signal that drives an optical modulator that modulates the optical pulse train. The microwave photodiode, optical modulator, and servo amplifier form a feedback loop that suppresses amplitude noise on the microwave signal. By reducing amplitude noise and relative intensity noise, phase noise caused by amplitude-to-phase noise conversion is minimized.
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公开(公告)号：US12079692B2
公开(公告)日：2024-09-03
申请号：US17008832
申请日：2020-09-01
申请人： Quantinuum LLC
发明人： Matthew Bohn , Lora Nugent
CPC分类号： G06N10/40 , G02F1/353 , H01S3/1305 , G02F2203/56
摘要： Various embodiments for precise and accurate delivery, in terms of position, frequency, and/or phase, of one or more lasers to an atomic system are provided. In a first embodiment, a gate laser system for a trapped ion quantum computer comprising a first and second laser are provided. The first and second lasers are frequency locked to a first and second frequency of a frequency comb, respectively. The first and second lasers are each configured to provide laser beams to a qubit ion within an ion trap of the quantum computer to provide a gate. In another embodiment, a qubit ion and sympathetic ion management system for a trapped ion quantum computer comprising a first, second, and third laser is provided. Each laser is locked to a different frequency of a frequency comb, and provide one or more laser beams to an ion trap of the quantum computer.
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公开(公告)号：US20240291225A1
公开(公告)日：2024-08-29
申请号：US18659591
申请日：2024-05-09
申请人： Quanta Computer Inc.
发明人： Chang-Sheng LIN , Hsiao-Hsien Weng , Zong-Syun He
CPC分类号： H01S3/1305 , G02B6/4246 , H01S5/0261 , H01S5/0617 , H01S5/06825 , H01S5/0683
摘要： A system and method for safe use of an optics assembly with an external light source and an optically coupled optics module is disclosed. The system includes an external light module emitting a continuous wave laser through an output port. An optics module has an input port and a memory. The optics module generates a modulated optical signal. The memory stores the power level of the continuous wave laser signal received by the optics module. An optical jumper is provided for coupling the output port with the input port. A communication bus is coupled between a controller and the external light source module. The controller sets the external light source at a low power level and transitions the external light source to a high power level when the stored power level of the continuous wave laser signal received by the optics module exceeds a predetermined level.
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公开(公告)号：US20240235148A1
公开(公告)日：2024-07-11
申请号：US18398383
申请日：2023-12-28
IPC分类号： H01S3/13 , H01S3/094 , H01S3/1112 , H01S3/16
CPC分类号： H01S3/1305 , H01S3/094026 , H01S3/1112 , H01S3/1304 , H01S3/1307 , H01S3/1683
摘要： A feedback oscillator, with an amplifier whose output is partially fed back to its input, provides a stable reference for standardization and synchronization. The laser is a feedback oscillator whose performance can be limited by quantum fluctuations. The resulting frequency instability, quantified by the Schawlow-Townes formula, sets a limit to laser linewidth. Here, we show that the Schawlow-Townes formula applies to feedback oscillators beyond lasers. This is because it arises from quantum noise added by the amplifier and an out-coupler in the feedback loop. Tracing the origin of quantum noise in an oscillator informs techniques to systematically evade it: squeezing and entanglement can enable sub-Schawlow-Townes linewidth feedback oscillators. We clarify the quantum limits to the stability of feedback oscillators, derive a standard quantum limit (SQL) for feedback oscillators, and disclose quantum strategies for realizing sub-SQL feedback oscillators.
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公开(公告)号：US20240213735A1
公开(公告)日：2024-06-27
申请号：US18394626
申请日：2023-12-22
发明人： Andrei Isichenko , Nitesh Chauhan , Jiawei Wang , Mark Harrington , Kaikai Liu , Daniel J. Blumenthal
CPC分类号： H01S3/137 , H01S3/1305
摘要： A device may at least one laser with a first optical frequency the at least one laser stabilized to a at least one frequency reference, wherein the at least one laser is locked to the at least one frequency reference. A device may at least one photodiode and at least one laser current servo for locking the at least one laser to the at least one frequency reference. A device may at least one modulator configured to modulate a resonator, wherein the at least one frequency reference is a resonator, the resonator comprising a waveguide core and a tuner, wherein the tuner is laterally offset from the waveguide core.
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公开(公告)号：US20240195138A1
公开(公告)日：2024-06-13
申请号：US18533407
申请日：2023-12-08
IPC分类号： H01S3/067 , H01S3/0915 , H01S3/13 , H04J14/00
CPC分类号： H01S3/06716 , H01S3/0915 , H01S3/13013 , H04J14/052
摘要： An integrated, high-performance amplifier subsystem is based on an optimized design of a multimode erbium-doped fiber amplifier (MM-EDFA) and a wavelength- and mode-selective pump coupler (PC). The length and ring doping profile of the MM-EDF and the pump-mode powers can be optimized to obtain low mode-dependent gain (MDG), low noise figure (NF) and high power-conversion efficiency (PCE). The pump coupler can be designed with high pump-mode efficiency and low signal-mode loss by appropriate selection of the pump mode group and the index exponent of an intermediate graded-index (GI) coupling fiber.
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公开(公告)号：US12009630B2
公开(公告)日：2024-06-11
申请号：US17154847
申请日：2021-01-21
申请人： Quanta Computer Inc.
发明人： Chang-Sheng Lin , Hsiao-Hsien Weng , Zong-Syun He
CPC分类号： H01S3/1305 , G02B6/4246 , H01S5/0261 , H01S5/0617 , H01S5/06825 , H01S5/0683
摘要： A system and method for safe use of an optics assembly with an external light source and an optically coupled optics module is disclosed. The system includes an external light module emitting a continuous wave laser through an output port. An optics module has an input port and a memory. The optics module generates a modulated optical signal. The memory stores the power level of the continuous wave laser signal received by the optics module. An optical jumper is provided for coupling the output port with the input port. A communication bus is coupled between a controller and the external light source module. The controller sets the external light source at a low power level and transitions the external light source to a high power level when the stored power level of the continuous wave laser signal received by the optics module exceeds a predetermined level.
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公开(公告)号：US11949208B2
公开(公告)日：2024-04-02
申请号：US17522978
申请日：2021-11-10
发明人： Fupeng Wang , Rui Liang , Qingsheng Xue , Jinghua Wu , Xijie Hao
CPC分类号： H01S3/13 , G01N15/06 , H01S3/0064 , H01S3/06716 , H01S3/0675 , H01S3/094011 , H01S3/11 , H01S3/1616 , G01N2015/0693
摘要： The present disclosure discloses a degassing-free underwater dissolved carbon dioxide detection device and a detection method. The degassing-free underwater dissolved carbon dioxide detection device includes a computer, which is used to provide the driving signal and controlling parameters for the power tuning unit; the computer is connected with a laser driving control module and the power tuning unit, respectively; the laser driving control module is connected with a laser; the laser is connected with a photo-isolator; the photo-isolator is connected with a thulium-doped fiber vertical-cavity laser system; the thulium-doped fiber vertical-cavity laser system is connected with a photoacoustic cell system through a fiber collimator; the photoacoustic cell system is connected with a pre-amplifier circuit and a lock-in amplifier in sequence, and the lock-in amplifier is connected with the computer.
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公开(公告)号：US20240106183A1
公开(公告)日：2024-03-28
申请号：US17953849
申请日：2022-09-27
CPC分类号： H01S3/06716 , H01S3/0064 , H01S3/094003 , H01S3/13013 , H01S3/1613
摘要： An optical signal amplifier using a praseodymium doped fiber is described. The optical signal amplifier includes a signal laser, a first optical isolator, a second optical isolator a pump laser, a wave division multiplexer, a silica based glass optical fiber, a second optical isolator, an optical power meter, and an optical spectrum analyzer (OSA). The signal laser generates a signal laser beam. The pump laser generates a pumped laser beam. The wave division multiplexer combines the signal laser beam and the pumped laser beam and generates a combined laser beam. The silica based glass optical fiber has a preferred concentration of praseodymium ions of about 50×1024 ions/m3 and a length of about 5.7 m. The silica based glass optical fiber receives the combined laser beam, amplifies photons in the combined laser beam, and generates an amplified laser beam.
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10.发明授权公开(公告)号：US11942754B2
公开(公告)日：2024-03-26
申请号：US17043281
申请日：2018-09-27
发明人： Lebao Yang , Xianbin Wang
CPC分类号： H01S3/131 , G03B21/2033 , H01S3/10069 , H01S3/1305 , H01S3/2383
摘要： The present invention discloses a driving current correction method and apparatus for multiple laser devices, and a laser projector. A specific embodiment of the method includes in a projection period of a n-th pixel point: sequentially driving a plurality of laser devices of a laser source to emit laser, and respectively detecting light intensity information of lasers emitted from the plurality of laser devices by using a light sensor; acquiring an actual light intensity of the lasers emitted from the plurality of laser devices according to an electric signal output by the light sensor, and establishing a corresponding relation between a driving current and an actual light intensity of each laser device according to the driving current of the each laser device and the actual light intensity of the laser emitted from the each laser device when the n-th pixel point is projected; from a projection of a (n+1)-th pixel point: correcting the driving current of the each laser device according to a set light intensity of the each laser device and the corresponding relation between the driving current and the actual light intensity of the each laser device. The implementation has a high consistency of detecting light intensity information that can be simply performed.
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