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公开(公告)号：US10014649B2
公开(公告)日：2018-07-03
申请号：US15387089
申请日：2016-12-21
Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY , HQPHOTONICS INC.
Inventor： Jiang Li , Kerry Vahala
CPC classification number: H01S3/06791 , G02B6/293 , G02B6/2934 , H01S3/06708 , H01S3/094003 , H01S3/094049 , H01S3/094096 , H01S3/1086 , H01S3/1109 , H01S3/1305 , H01S3/1312 , H01S3/302 , H03B17/00
Abstract: A stabilized laser source includes a fiber-ring Brillouin laser that incorporates a circulator for non-reciprocal operation and for launching of a pump optical signal. Most of the pump optical signal is launched in a forward direction and drives Brillouin laser oscillation in the backward direction, a portion of which exits via an optical coupler as the optical output of the laser source. A small fraction of the pump optical signal is launched in the backward direction via the optical coupler, and a fraction of that backward-propagating pump optical signal exits via the optical coupler as an optical feedback signal. A frequency-locking mechanism receives the optical feedback signal and controls the pump optical frequency to maintain resonant propagation of the backward-propagating pump optical signal. A second pump optical signal can be launched in the forward direction to generate a second Brillouin laser oscillation.
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公开(公告)号：US20150311662A1
公开(公告)日：2015-10-29
申请号：US14640031
申请日：2015-03-06
Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY
Inventor： Kerry Vahala , Jiang Li
CPC classification number: H03B17/00 , H01S3/005 , H01S3/06791 , H01S3/0809 , H01S3/09415 , H01S3/1312 , H01S3/302 , H01S5/0085
Abstract: A microwave-frequency source, generating an output electrical signal at an output frequency fM, comprises a pump laser source, an optical resonator, and a photodetector. Free spectral range vFSR of the optical resonator equals an integer submultiple of a Brillouin shift frequency vB of the optical resonator (i.e., vB=MvFSR). The pump laser source is frequency-locked to a corresponding resonant optical mode of the optical resonator. Pumping the optical resonator with output of the pump laser source at a pump frequency vpump results in stimulated Brillouin laser oscillation in the optical resonator at respective first, second, and third Stokes Brillouin-shifted frequencies v1=vpump−vB, v2=vpump−2vB, and v3=vpump−3vB. The photodetector receives stimulated Brillouin laser outputs at the first and third Stokes Brillouin-shifted frequencies v1 and v3 and generates therefrom the output electrical signal at a beat frequency fM=v1−v3=2vB. The output electrical signal at the output frequency fM exhibits exceptionally low phase noise.
Abstract translation: 以输出频率fM产生输出电信号的微波频率源包括泵激光源，光谐振器和光电检测器。 光谐振器的自由光谱范围vFSR等于光谐振器的布里渊移位频率vB的整数倍（即vB = MvFSR）。 泵激光源被频率锁定到光谐振器的对应的谐振光学模式。 以泵浦频率泵浦泵浦激光源的输出的光学谐振器在相应的第一，第二和第三斯托克斯布里渊偏移频率v1 = vpump-vB，v2 = vpump-2vB的情况下导致光学谐振器中的受激布里渊激光振荡 ，v3 = vpump-3vB。 光电检测器以第一和第三斯托克斯布里渊移位频率v1和v3接收受激布里渊激光输出，并以其频率fM = v1-v3 = 2vB产生输出电信号。 输出频率fM的输出电信号表现出极低的相位噪声。
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公开(公告)号：US09042003B2
公开(公告)日：2015-05-26
申请号：US14513058
申请日：2014-10-13
Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY
Inventor： Jiang Li , Hansuek Lee , Tong Chen , Kerry Vahala
CPC classification number: G02F1/353 , G02F1/2257 , G02F2201/063 , G02F2201/17 , G02F2201/58 , G02F2202/09 , G02F2202/105 , G02F2203/15 , G02F2203/54 , G02F2203/56 , G02F2203/69
Abstract: A frequency comb generator fabricated on a chip with elimination of a disadvantageous reflow process, includes an ultra-high Q disk resonator having a waveguide that is a part of a wedge structure fabricated from a silicon dioxide layer of the chip. The disk resonator allows generation of a frequency comb with a mode spacing as low as 2.6 GHz and up to 220 GHz. A surface-loss-limited behavior of the disk resonator decouples a strong dependence of pumping threshold on repetition rate.
Abstract translation: 制造在芯片上的消除不利的回流工艺的频率梳发生器包括具有作为由芯片的二氧化硅层制成的楔形结构的一部分的波导的超高Q盘谐振器。 磁盘谐振器允许产生低至2.6GHz和高达220GHz的模式间隔的频率梳。 盘式谐振器的表面损耗受限行为使抽水阈值对重复率的强烈依赖性解耦。
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公开(公告)号：US11326884B2
公开(公告)日：2022-05-10
申请号：US16789404
申请日：2020-02-12
Applicant: California Institute of Technology
Inventor： Kerry Vahala , Jiang Li , Yu-Hung Lai , Myoung-Gyun Suh , Seung Hoon Lee
Abstract: A disk resonator is pumped by counterpropagating pump signals to produce corresponding counterpropagating Brillouin laser signals. The pump laser optical frequencies are separated by a frequency offset ΔνP but excite the same nominal resonator optical mode; the Brillouin laser optical frequencies are separated by a beat frequency ΔνL with 0
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公开(公告)号：US20210278215A1
公开(公告)日：2021-09-09
申请号：US16789404
申请日：2020-02-12
Applicant: California Institute of Technology
Inventor： Kerry Vahala , Jiang Li , Yu-Hung Lai , Myoung-Gyun Suh , Seung Hoon Lee
Abstract: A disk resonator is pumped by counterpropagating pump signals to produce corresponding counterpropagating Brillouin laser signals. The pump laser optical frequencies are separated by a frequency offset ΔνP but excite the same nominal resonator optical mode; the Brillouin laser optical frequencies are separated by a beat frequency ΔνL with 0
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Patent Agency Ranking
公开(公告)号：US09595918B2
公开(公告)日：2017-03-14
申请号：US14640031
申请日：2015-03-06
Applicant: California Institute of Technology
Inventor： Jiang Li , Kerry Vahala
CPC classification number: H03B17/00 , H01S3/005 , H01S3/06791 , H01S3/0809 , H01S3/09415 , H01S3/1312 , H01S3/302 , H01S5/0085
Abstract: A microwave-frequency source, generating an output electrical signal at an output frequency fM, comprises a pump laser source, an optical resonator, and a photodetector. Free spectral range vFSR of the optical resonator equals an integer submultiple of a Brillouin shift frequency vB of the optical resonator (i.e., vB=MvFSR). The pump laser source is frequency-locked to a corresponding resonant optical mode of the optical resonator. Pumping the optical resonator with output of the pump laser source at a pump frequency vpump results in stimulated Brillouin laser oscillation in the optical resonator at respective first, second, and third Stokes Brillouin-shifted frequencies v1=vpump−vB, v2=vpump−2vB, and v3=vpump−3vB. The photodetector receives stimulated Brillouin laser outputs at the first and third Stokes Brillouin-shifted frequencies v1 and v3 and generates therefrom the output electrical signal at a beat frequency fM=v1−v3=2vB. The output electrical signal at the output frequency fM exhibits exceptionally low phase noise.
Abstract translation: 以输出频率fM产生输出电信号的微波频率源包括泵激光源，光谐振器和光电检测器。 光谐振器的自由光谱范围vFSR等于光谐振器的布里渊移位频率vB的整数倍（即vB = MvFSR）。 泵激光源被频率锁定到光谐振器的对应的谐振光学模式。 以泵浦频率泵浦泵浦激光源的输出的光学谐振器在相应的第一，第二和第三斯托克斯布里渊移位频率v1 = vpump-vB，v2 = vpump-2vB的情况下导致在光学谐振器中的受激布里渊激光振荡 ，v3 = vpump-3vB。 光电检测器以第一和第三斯托克斯布里渊移位频率v1和v3接收受激布里渊激光输出，并以其频率fM = v1-v3 = 2vB产生输出电信号。 输出频率fM的输出电信号表现出极低的相位噪声。
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公开(公告)号：US09537571B2
公开(公告)日：2017-01-03
申请号：US14605987
申请日：2015-01-26
Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY
Inventor： Jiang Li , Kerry Vahala
IPC: H04B10/00 , H04L7/00 , H04B10/2507 , H04B10/2575 , H04B10/25 , H04B10/50 , H03L7/08 , H03L7/16
CPC classification number: H04B10/2507 , H03B17/00 , H03L7/08 , H03L7/16 , H04B10/2504 , H04B10/2575 , H04B10/503 , H04B2210/006 , H04L7/0075 , H04L7/0091
Abstract: A dual-frequency optical source comprises: (a) first and second pump laser sources arranged to generate optical pump power at respective first and second pump laser frequencies vpump1 and vpump2; and (b) a fiber optical resonator characterized by a Brillouin shift frequency vB and a free spectral range that is substantially equal to an integer submultiple of the Brillouin shift frequency. Each one of the first and second pump laser sources is frequency-locked to a corresponding resonant optical mode of the fiber optical resonator. First and second optical output signals of the dual-frequency optical reference source at respective first and second output frequencies v1=vpump1−vB and v2=vpump2−vB comprise stimulated Brillouin laser output generated by simultaneous optical pumping of the fiber optical resonator by the first and second pump laser sources, respectively. An output difference frequency v2−v1 is greater than about 300 GHz.
Abstract translation: 双频光源包括：（a）第一和第二泵浦激光源，被布置成在相应的第一和第二泵浦激光频率vpump1和vpump2处产生光泵浦功率; 以及（b）以布里渊移动频率vB为特征的光纤谐振器，和基本上等于布里渊移动频率的整数倍的自由光谱范围。 第一和第二泵浦激光源中的每一个被频率锁定到光纤光谐振器的相应的谐振光学模式。 在相应的第一和第二输出频率v1 = vpump1-vB和v2 = vpump2-vB处的双频光参考源的第一和第二光输出信号包括通过第一和第二信号同时光纤泵浦光纤光学谐振器而产生的受激布里渊激光输出 和第二泵激光源。 输出差频v2-v1大于约300GHz。
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公开(公告)号：US10009103B2
公开(公告)日：2018-06-26
申请号：US15235075
申请日：2016-08-11
Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY , THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF COMMERCE
Inventor： Kerry Vahala , Scott Diddams , Jiang Li , Xu Yi , Hansuek Lee
IPC: H03B17/00 , H04B10/2507 , H04B10/2575 , H04B10/25 , H04B10/50 , H04L7/00 , H03L7/08 , H03L7/16
CPC classification number: H04B10/2507 , H03B17/00 , H03L7/08 , H03L7/16 , H04B10/2504 , H04B10/2575 , H04B10/503 , H04B2210/006 , H04L7/0075 , H04L7/0091
Abstract: A microwave-frequency source at frequency fM comprises: a dual optical-frequency reference source, an electro-optic sideband generator, an optical bandpass filter, an optical detector, a reference oscillator, an electrical circuit, and a voltage-controlled oscillator (VCO). The sideband generator modulates dual optical reference signals at v2 and v1 to generate sideband signals at v1±n1fM and v2±n2fM. The bandpass filter transmits sideband signals at v1+N1fM and v2−N2fM. The optical detector generates a beat note at (v2−N2fM)−(v1+N1fM). The beat note and a reference oscillator signal are processed by the circuit to generate a loop-filtered error signal to input to the VCO. Output of the VCO at fM drives the sideband generator and forms the microwave-frequency output signal. The resultant frequency division results in reduced phase noise on the microwave-frequency signal.
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公开(公告)号：US09905999B2
公开(公告)日：2018-02-27
申请号：US15053876
申请日：2016-02-25
Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY
Inventor： Jiang Li , Kerry Vahala
IPC: H01S5/068 , H01S5/0687 , H01S5/00 , H01S5/04 , H01S5/062 , H01S5/40 , H01S3/06 , H01S3/13 , H01S3/30 , H01S3/00 , H03L7/00 , H03B17/00 , H01S3/067 , H01S3/23
CPC classification number: H01S5/0687 , H01S3/0085 , H01S3/0627 , H01S3/06791 , H01S3/1304 , H01S3/1305 , H01S3/1307 , H01S3/2391 , H01S3/30 , H01S5/0078 , H01S5/041 , H01S5/0623 , H01S5/06817 , H01S5/40 , H03B17/00 , H03L7/00
Abstract: Microwave-frequency signal generation by generating multiple sideband optical signals separated by phase-modulation frequency fM, generating beat signals between one or two sidebands and one or two optical reference signals, generating a loop-filtered error signal by comparing an electrical reference signal to one of the beat signals or their difference, and controlling with the error signal in a phase-locked loop arrangement a voltage-controlled oscillator (VCO) that drives the sideband generation at the frequency fM. A portion of the VCO output is the generated microwave-frequency signal.
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公开(公告)号：US09450673B2
公开(公告)日：2016-09-20
申请号：US14605977
申请日：2015-01-26
Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY , THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF COMMERCE, THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY
Inventor： Kerry Vahala , Scott Diddams , Jiang Li , Xu Yi , Hansuek Lee
IPC: H04B10/2507 , H04B10/2575 , H04B10/25 , H04B10/50 , H04L7/00 , H03L7/08 , H03L7/16
CPC classification number: H04B10/2507 , H03B17/00 , H03L7/08 , H03L7/16 , H04B10/2504 , H04B10/2575 , H04B10/503 , H04B2210/006 , H04L7/0075 , H04L7/0091
Abstract: A microwave-frequency source at frequency fM comprises: a dual optical-frequency reference source, an electro-optic sideband generator, an optical bandpass filter, an optical detector, a reference oscillator, an electrical circuit, and a voltage-controlled oscillator (VCO). The sideband generator modulates dual optical reference signals at v2 and v1 to generate sideband signals at v1±n1fM and v2±n2fM. The bandpass filter transmits sideband signals at v1+N1fM and v2−N2fM. The optical detector generates a beat note at (v2−N2fM)−(v1+N1fM). The beat note and a reference oscillator signal are processed by the circuit to generate a loop-filtered error signal to input to the VCO. Output of the VCO at fM drives the sideband generator and forms the microwave-frequency output signal. The resultant frequency division results in reduced phase noise on the microwave-frequency signal.
Abstract translation: 频率fM的微波频率源包括：双光频参考源，电光边带发生器，光带通滤波器，光检测器，参考振荡器，电路和压控振荡器（VCO ）。 边带发生器在v2和v1处调制双光参考信号，以在v1±n1fM和v2±n2fM产生边带信号。 带通滤波器发送v1 + N1fM和v2-N2fM的边带信号。 光学检测器在（v2-N2fM） - （v1 + N1fM）处产生节拍。 拍音和参考振荡器信号由电路处理以产生环路滤波的误差信号以输入到VCO。 在fM处的VCO的输出驱动边带发生器并形成微波频率输出信号。 所得到的分频导致微波频率信号上的相位噪声减小。
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