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公开(公告)号：US09945731B1
公开(公告)日：2018-04-17
申请号：US14596825
申请日：2015-01-14
发明人： Oleg M. Efimov , Keyvan R. Sayyah
CPC分类号： G01J9/02 , G01J1/0437 , G01J1/0448 , G01J2009/0203 , G01J2009/0249
摘要： A system includes a source of laser beams forming an array, a source of a reference laser beam, and an optical detector for measuring respective phase differences between the array laser beams and the reference laser beam. The system includes a mask, having apertures with a shape, size and position identical to a shape, size and position of the array laser beams, and positioned in the reference laser beam to form respective beams of the reference laser beam corresponding to the beams from the array laser beams. A phase modulator phase modulates respective beams of one of (a) the array laser beams and (b) the beams of the reference laser from the mask. A photodetector receives the respective array laser beams and the corresponding reference laser beams from the mask to generate a composite signal. Processing circuitry is responsive to the composite signal for generating respective signals representing the phase differences of the individual laser beams from the reference laser beam.
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公开(公告)号：US09800018B2
公开(公告)日：2017-10-24
申请号：US15048440
申请日：2016-02-19
IPC分类号： H01S5/06 , H01S5/022 , H01S5/024 , H01S5/028 , H01S5/042 , H01S5/0683 , H01S5/10 , H01S5/125 , H01S5/343 , H01S5/40 , H01S3/23 , H01S5/00 , H01S5/068 , H01S5/50 , H01S5/026 , H01S5/22 , H01S5/187 , H01S5/20
CPC分类号： H01S5/0604 , H01S3/2383 , H01S5/0092 , H01S5/0228 , H01S5/02453 , H01S5/0261 , H01S5/0264 , H01S5/028 , H01S5/0287 , H01S5/0425 , H01S5/06821 , H01S5/0683 , H01S5/1014 , H01S5/1028 , H01S5/1064 , H01S5/125 , H01S5/187 , H01S5/2013 , H01S5/22 , H01S5/34333 , H01S5/4025 , H01S5/4031 , H01S5/50 , H01S2301/166
摘要： A chip scale ultra violet laser source includes a plurality of laser elements on a substrate each including a back cavity mirror, a tapered gain medium, an outcoupler, a nonlinear crystal coupled to the outcoupler with a front facet that has a first coating that is anti-reflectivity (AR) to a fundamental wavelength of the laser element and high reflectivity (HR) to ultra violet wavelengths, and has an exit facet that has a second coating that has HR to a fundamental wavelength of the laser element and AR to the ultra violet wavelengths, a photodetector coupled to the outcoupler, a phase modulator coupled to the photodetector and coupled to the back cavity mirror, and a master laser diode on the substrate coupled to the phase modulator of each laser element. Each laser element emits an ultra violet beamlet and is frequency and phase locked to the master laser diode.
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公开(公告)号：US20150378012A1
公开(公告)日：2015-12-31
申请号：US14317695
申请日：2014-06-27
申请人： HRL LABORATORIES LLC
CPC分类号： G01S7/4817 , G01S7/4808 , G01S17/02 , G01S17/325 , G01S17/89 , H01S5/021 , H01S5/0215 , H01S5/0262 , H01S5/12
摘要： A chip-scale scanning lidar includes a two dimensional (2D) scanning micromirror for a transmit beam and a 2D scanning micromirror for a receive beam, a laser diode and a photodetector, a first waveguide and first grating outcoupler coupled to a front facet of the laser diode, a second waveguide and a second grating outcoupler coupled to a rear facet of the laser diode on a substrate. A first fixed micromirror, a second micromirror, a third micromirror, and a focusing component are in a dielectric layer bonded to the substrate over the laser diode and photodetector. The photodetector is optically coupled to the second fixed micromirror and the third fixed micromirror for coherent detection.
摘要翻译： 芯片级扫描激光雷达包括用于发射光束的二维（2D）扫描微镜和用于接收光束的2D扫描微镜，激光二极管和光电检测器，第一波导和第一光栅输出耦合器，其耦合到 激光二极管，第二波导和第二光栅输出耦合器，耦合到衬底上的激光二极管的后面。 第一固定微镜，第二微镜，第三微镜和聚焦组件位于激光二极管和光电检测器上结合到衬底的电介质层中。 光电检测器光耦合到第二固定微镜和第三固定微镜用于相干检测。
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公开(公告)号：US10422868B2
公开(公告)日：2019-09-24
申请号：US15648274
申请日：2017-07-12
发明人： Oleg M. Efimov
IPC分类号： G01S7/491 , G01P13/04 , G01S7/481 , G01S17/32 , G01S17/58 , G01S17/95 , G01S7/48 , G01N21/47 , G01N21/63 , G01R31/28 , H04L27/10 , H04L27/144 , G01K11/32 , G01R35/00
摘要： An apparatus for measuring at least one of pressure, temperature, and wind velocity of a volume of air includes a laser having a first frequency and a second frequency of radiation, a first waveguide coupled to the laser, a second waveguide, a narrowband filter coupled between the first waveguide and the second waveguide, wherein the narrowband filter is configured to redirect the first frequency to the second waveguide, and a photodetector coupled to the second waveguide, wherein the first frequency is transmitted by the first waveguide to the volume of air, scattered light is received from the volume of air, and the photodetector mixes the first frequency on the second waveguide with the received scattered light.
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公开(公告)号：US09377567B1
公开(公告)日：2016-06-28
申请号：US13918711
申请日：2013-06-14
IPC分类号： G02B5/18
CPC分类号： G02B5/1847 , G02B5/18 , G02B5/1857 , G03F7/0005
摘要： A diffraction grating and a method for fabricating the diffraction grating. In one embodiment, a layer of photo-monomer is applied to a substrate and the photomonomer is exposed to a collimated beam of light to form the diffraction grating. The intensity of the collimated beam of light incident on the layer of photo-monomer may have substantially no spatial variation across the first collimated beam of light.
摘要翻译： 衍射光栅和衍射光栅的制造方法。 在一个实施方案中，将一层光单体施加到基底上，并将光单体暴露于准直光束以形成衍射光栅。 入射在光单体层上的准直光束的强度可能在第一准直光束上基本上没有空间变化。
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公开(公告)号：US09310471B2
公开(公告)日：2016-04-12
申请号：US14317695
申请日：2014-06-27
申请人： HRL LABORATORIES LLC
CPC分类号： G01S7/4817 , G01S7/4808 , G01S17/02 , G01S17/325 , G01S17/89 , H01S5/021 , H01S5/0215 , H01S5/0262 , H01S5/12
摘要： A chip-scale scanning lidar includes a two dimensional (2D) scanning micromirror for a transmit beam and a 2D scanning micromirror for a receive beam, a laser diode and a photodetector, a first waveguide and first grating outcoupler coupled to a front facet of the laser diode, a second waveguide and a second grating outcoupler coupled to a rear facet of the laser diode on a substrate. A first fixed micromirror, a second micromirror, a third micromirror, and a focusing component are in a dielectric layer bonded to the substrate over the laser diode and photodetector. The photodetector is optically coupled to the second fixed micromirror and the third fixed micromirror for coherent detection.
摘要翻译： 芯片级扫描激光雷达包括用于发射光束的二维（2D）扫描微镜和用于接收光束的2D扫描微镜，激光二极管和光电检测器，第一波导和第一光栅输出耦合器，其耦合到 激光二极管，第二波导和第二光栅输出耦合器，耦合到衬底上的激光二极管的后面。 第一固定微镜，第二微镜，第三微镜和聚焦组件位于激光二极管和光电检测器上结合到衬底的电介质层中。 光电检测器光耦合到第二固定微镜和第三固定微镜用于相干检测。
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公开(公告)号：US09250452B1
公开(公告)日：2016-02-02
申请号：US13651399
申请日：2012-10-13
发明人： Daniel Yap , James H. Schaffner , Oleg M. Efimov
CPC分类号： G02B6/02076 , G02B6/4279 , G02B2006/12142 , G02F1/0356 , G02F2201/305 , H04B2210/006
摘要： An photonic RF circulator is described that provides greater than 40 db of isolation between a Received RF signal and a Transmitted RF signal in a simultaneous transmit and receive device. The photonic RF circulator uses light modulated in an optical waveguide grating where the Received RF signal co-propagates with the light and the Transmitted RF signal counter-propagates with the light. Variations described within provide for broadening the bandwidth of the T/R isolation and rejection of various noise sources.
摘要翻译： 描述了在同时发送和接收设备中在接收RF信号和发射RF信号之间提供大于40db隔离的光子RF环行器。 光子RF循环器使用在光波导光栅中调制的光，其中接收RF信号与光共同传播，并且发射的RF信号与光反向传播。 所描述的变化提供了扩展T / R隔离和拒绝各种噪声源的带宽。
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公开(公告)号：US10928519B2
公开(公告)日：2021-02-23
申请号：US15947742
申请日：2018-04-06
发明人： James H. Schaffner , Richard M. Kremer , Raymond Sarkissian , Andrew C. Keefe , Pamela R. Patterson , Erik S. Daniel , Brian N. Limketkai , Guillermo A. Herrera , Keyvan R. Sayyah , Oleg M. Efimov
摘要： A continuous wave (CW) heterodyne light detection and ranging (LIDAR) air velocity sensor system that comprises a first light emitting structure arranged to send a signal light in a first direction in space; a second light emitting structure arranged to produce a local oscillator light having a wavelength different from the wavelength of the signal light by a predetermined wavelength; a receiver arranged to receive light from said first direction in space; and a first optical mixer for mixing the received light with said local oscillator light.
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公开(公告)号：US11300754B2
公开(公告)日：2022-04-12
申请号：US16855318
申请日：2020-04-22
摘要： A micro-optical bench includes a substrate having a multi-layer trench and a micro-lens aligned by and mounted to the substrate in the multi-layer trench.
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公开(公告)号：US20210063676A1
公开(公告)日：2021-03-04
申请号：US16855318
申请日：2020-04-22
摘要： A micro-optical bench includes a substrate having a multi-layer trench and a micro-lens aligned by and mounted to the substrate in the multi-layer trench.
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