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    SYSTEMS AND METHODS FOR REDUCTION OF OPTICAL SIGNAL LINEWIDTH
    1.
    发明公开
    SYSTEMS AND METHODS FOR REDUCTION OF OPTICAL SIGNAL LINEWIDTH 审中-公开

    公开(公告)号：US20240322517A1

    公开(公告)日：2024-09-26

    申请号：US17376894

    申请日：2021-07-15

    Applicant: Honeywell International Inc.

    Inventor： Chad Fertig ,  Chad Hoyt ,  Glen A. Sanders ,  Jianfeng Wu ,  Mary Salit

    IPC: H01S3/067 ,  H01S3/08

    CPC classification number: H01S3/0675 ,  H01S3/08013

    Abstract: In some embodiments, a system includes a laser that generates an optical signal and a resonator that receives the optical signal. The resonator includes an optical resonator cavity comprising a first and second end, wherein the optical signal propagates at a resonant frequency; a first optical anti-resonator terminating the first end and having a first stopband; and a second optical anti-resonator terminating the second end and having a second stopband. The system includes a detector that generates an electrical signal from a modified resonator output of the resonator; and Pound-Drever-Hall servo circuitry configured to generate control signals for controlling a frequency of the optical signal generated by the laser or phase modulation devices attached to the optical resonator cavity or the first or second optical anti-resonator, wherein each phase modulation changes a length of at least one of the optical resonator cavity or the first or second optical anti-resonator.

    ULTRA-HIGH STABILITY BRILLOUIN LASER
    4.
    发明公开
    ULTRA-HIGH STABILITY BRILLOUIN LASER 审中-公开

    公开(公告)号：US20230318253A1

    公开(公告)日：2023-10-05

    申请号：US18177410

    申请日：2023-03-02

    Applicant: IMRA America, Inc.

    Inventor： Martin E. Fermann ,  Antoine Jean Gilbert Rolland ,  Peng Li

    IPC: H01S3/30 ,  H01S3/13 ,  H01S3/0941 ,  H01S3/094 ,  H01S3/10 ,  H01S3/00 ,  H01S3/08

    CPC classification number: H01S3/302 ,  H01S3/0085 ,  H01S3/08013 ,  H01S3/094076 ,  H01S3/0941 ,  H01S3/10092 ,  H01S3/1305

    Abstract: Example ultra narrow linewidth Brillouin lasers are disclosed that are pumped by pump lasers that are controlled via optimal control schemes in order to stabilize the Brillouin laser output frequency and minimize the Brillouin output linewidth. The control schemes are based on feedback loops to match the pump laser frequency to the optimum Stokes shift on the one hand and to line-narrow the pump laser linewidth on the other hand via comparing the linewidth of the pump laser with the linewidth of the Brillouin laser. The feedback loops in the control schemes can be partially or fully replaced with feedforward control schemes, allowing for larger bandwidth control. Provision for simultaneous oscillation of the Brillouin lasers on two polarization modes allows for further line-narrowing of the Brillouin output. The ultra-narrow linewidth Brillouin lasers can be advantageously implemented as pumps for microresonator based frequency combs, and can also be integrated to the chip scale and be constructed with minimal vibration sensitivity. The ultra-narrow linewidth Brillouin lasers can be widely tuned and a frequency readout can be provided via the use of a frequency comb. When phase locking a frequency comb to the Brillouin laser, ultra-stable microwave generation can be facilitated.

    Polarization laser sensor
    6.
    发明授权
    Polarization laser sensor 有权

    公开(公告)号：US09837785B2

    公开(公告)日：2017-12-05

    申请号：US15140067

    申请日：2016-04-27

    Applicant: SHENZHEN UNIVERSITY

    Inventor： Qiao Wen ,  Guowen Liang ,  Ji Li ,  Hanben Niu

    IPC: G01C19/66 ,  H01S3/08 ,  H01S3/10 ,  H01S3/083 ,  G01B9/02

    CPC classification number: H01S3/08059 ,  G01B9/02003 ,  G01B9/02023 ,  G01B2290/70 ,  H01S3/06712 ,  H01S3/06791 ,  H01S3/08013 ,  H01S3/082 ,  H01S3/083 ,  H01S3/10061

    Abstract: Systems and apparatuses for a polarization laser sensor are disclosed. The polarization laser sensor can include a pump source, a common section, a reference section and a detection section. The common section is provided with a gain medium, and the detection section is provided with a sensing element configured to cause an optical path difference. The reference section and the detection section are connected to the common section though a first polarization splitting unit and a second polarization splitting unit. The common section is provided with an output unit or each of the reference section and the detection is provided with the output unit, the output unit is connected to a photoelectric detector through a light uniting unit, and a polarization rotation unit is disposed between the light uniting unit and the output unit.

    LIGHT SOURCE DEVICE AND IMAGING APPARATUS USING THE SAME
    7.
    发明申请
    LIGHT SOURCE DEVICE AND IMAGING APPARATUS USING THE SAME 审中-公开
    光源装置和使用它的成像装置

    公开(公告)号：US20150380890A1

    公开(公告)日：2015-12-31

    申请号：US14843832

    申请日：2015-09-02

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Yukihiro Inoue ,  Tomohiro Yamada ,  Makoto Oigawa

    IPC: H01S3/08 ,  H01S3/083 ,  H01S3/107 ,  G02F1/01

    CPC classification number: H01S3/08013 ,  G02F1/011 ,  H01S3/083 ,  H01S3/107 ,  H01S3/1109 ,  H01S3/1121 ,  H01S5/146

    Abstract: A light source device includes an optical resonator that includes an optical gain medium amplifying light and an optical waveguide having wavelength dispersion of a refractive index, and an optical modulator that modulates an intensity of the light in the optical resonator. An oscillation wavelength of an optical pulse is varied according to a modulation frequency of the optical modulator. The optical modulator can adjust transmittance of the light passing through the optical modulator, and a duty ratio of a transmission time of the light passing through the optical modulator is less than 50%.

    Abstract translation: 光源装置包括光学谐振器，其包括放大光的光学增益介质和具有折射率的波长色散的光波导，以及调制光学谐振器中的光的强度的光学调制器。 光脉冲的振荡波长根据光调制器的调制频率而变化。 光调制器可以调节通过光调制器的光的透射率，并且通过光调制器的光的透射时间的占空比小于50％。

    Wavelength sweeping light source and imaging apparatus using the same
    9.
    发明授权
    Wavelength sweeping light source and imaging apparatus using the same 有权
    波长扫描光源及使用其的成像装置

    公开(公告)号：US08964803B2

    公开(公告)日：2015-02-24

    申请号：US13154127

    申请日：2011-06-06

    Applicant: Tomohiro Yamada ,  Kentaro Furusawa

    Inventor： Tomohiro Yamada ,  Kentaro Furusawa

    IPC: H01S3/10 ,  G01B9/02 ,  H01S5/065 ,  H01S5/14 ,  H01S3/08 ,  H01S3/083 ,  H01S5/00 ,  H01S5/0683 ,  H01S5/40

    CPC classification number: G01B9/02007 ,  G01B9/02004 ,  G01B9/02027 ,  G01B9/02091 ,  H01S3/08013 ,  H01S3/083 ,  H01S3/10046 ,  H01S5/0085 ,  H01S5/0656 ,  H01S5/0657 ,  H01S5/06835 ,  H01S5/14 ,  H01S5/4012 ,  H01S5/4087

    Abstract: A light source apparatus includes a laser oscillator equipped with a first optical resonator, a plurality of second optical resonators including input portions respectively connected in parallel to the first optical resonator, a plurality of light extraction units configured to extract a light beam from an output portion of each second optical resonator, and a light multiplexing unit configured to multiplex the light beam extracted from each light extraction unit, wherein the light source apparatus causes the light multiplexing unit to output a multiplexed light beam passed through the plurality of second optical resonators, an optical member having refractive index dispersion and an optical amplification medium are disposed in each of the plurality of second optical resonators, and the optical amplification media of the plurality of second optical resonators are different from each other in maximum gain wavelength.

    Abstract translation: 光源装置包括配备有第一光谐振器的激光振荡器，包括分别并联连接到第一光谐振器的输入部分的多个第二光谐振器，多个光提取单元，被配置为从输出部分 以及光复用单元，其被配置为对从每个光提取单元提取的光束进行多路复用，其中所述光源装置使所述光复用单元输出通过所述多个第二光谐振器的复用光束， 具有折射率色散的光学构件和光学放大介质设置在多个第二光学谐振器中的每一个中，多个第二光学谐振器的光学放大介质在最大增益波长方面彼此不同。

    OCT Swept Laser with Cavity Length Compensation
    10.
    发明申请
    OCT Swept Laser with Cavity Length Compensation 审中-公开
    OCT扫描激光器具有腔长度补偿

    公开(公告)号：US20140218741A1

    公开(公告)日：2014-08-07

    申请号：US14144636

    申请日：2013-12-31

    Applicant: Axsun Technologies, Inc.

    Inventor： Bartley C. Johnson ,  Dale C. Flanders

    IPC: H01S5/10 ,  G01B9/02

    CPC classification number: G01B9/02091 ,  H01S3/08009 ,  H01S3/08013 ,  H01S3/083 ,  H01S3/105 ,  H01S3/1062 ,  H01S5/02284 ,  H01S5/141 ,  H01S5/146

    Abstract: An optical coherence tomography system utilizes an optical swept laser that has cavity length compensator that changes an optical length of the laser cavity for different optical frequencies to increase the length of the laser cavity for lower optical frequencies. Specifically, a spectral separation between longitudinal cavity modes of the laser cavity is shortened or alternatively lengthened as a passband of a cavity tuning element sweeps through a scanband of the swept optical signal. In some examples, the compensator is implemented as two gratings. In others, it is implemented as a chirped grating device.

    Abstract translation: 光学相干断层扫描系统利用具有腔长补偿器的光扫描激光器，其改变不同光频率的激光腔的光学长度，以增加用于较低光频率的激光腔的长度。 具体地说，当空腔调谐元件的通带扫过扫描光信号的扫描带时，激光腔的纵向腔模之间的光谱间隔被缩短或者可选地延长。 在一些示例中，补偿器被实现为两个光栅。 在其他方面，它被实现为啁啾光栅装置。

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