公开(公告)号：US11415697B2

公开(公告)日：2022-08-16

申请号：US16419768

申请日：2019-05-22

Applicant: Raytheon Company

Inventor： Arthur M. Newman ,  Eran Marcus ,  Brian Boland

IPC: G01S17/89 ,  G01J1/44 ,  G01S7/4863 ,  G01S17/08

Abstract: A measured photo-event array is converted from two spatial coordinates and one temporal coordinate into three spatial coordinates for real-time imaging. Laser light pulses illuminate at least one object, and a Geiger-mode avalanche photodiode array receives photons from laser light reflected off the object. For each pulse of the laser light, the GMAPD outputs a first array of photo-events representative of reflected photons. A three-dimensional (3D) Gaussian distribution kernel arranged as a list of array locations to be processed and weight list(s) are provided. The weight list(s) specify an amount array values are scaled based on the Gaussian distribution or photon arrival time. A graphics processing unit arranges the first array of measured photo-events as a list, convolves the Gaussian displacement list with the list of measured photo-events to produce a convolution output, and applies weights from the weight list(s) to the values to produce a density point cloud.

公开(公告)号：US09280031B2

公开(公告)日：2016-03-08

申请号：US14340688

申请日：2014-07-25

Applicant: RAYTHEON COMPANY

Inventor： Robert Stultz ,  Brian Boland

IPC: G02F1/35 ,  G02F1/39 ,  G02F1/355

CPC classification number: G02F1/39 ,  G02F1/3501 ,  G02F1/3544 ,  G02F2001/3503 ,  G02F2001/3507 ,  G02F2001/392 ,  G02F2202/40

Abstract: An optical parametric amplifier and methods for idler extraction therein. Certain examples provide a method of extracting the idler at intermediate points within the optical parametric amplifier chain to improve conversion efficiency and/or maintain high beam quality (high Strehl ratio), where the pump beam has non-uniform profile. In one example, optical parametric amplifier includes an amplifier chain having a plurality of gain stages, each gain stage including a non-linear optical crystal, the plurality of gain stages configured to receive a signal seed and a pump beam and to produce an idler and an amplified signal, the pump beam having a non-uniform spatial profile, and a plurality of idler extractors interspersed with the plurality of gain stages and configured to extract the idler from intermediate points within the amplifier chain. The idler extractors can include polarizers, beam displacer crystals, or dichroic mirrors, for example.

Abstract translation: 一种光学参量放大器及其中的惰轮提取方法。 某些示例提供了一种在光学参量放大器链中的中间点提取惰轮的方法，以提高转换效率和/或保持高光束质量（高Strehl比），其中泵浦光束具有不均匀的轮廓。 在一个示例中，光学参量放大器包括具有多个增益级的放大器链，每个增益级包括非线性光学晶体，所述多个增益级被配置为接收信号种子和泵浦光束并产生惰轮和 放大信号，泵浦光束具有不均匀的空间分布，以及散布在多个增益级中并被配置为从放大器链中的中间点提取惰轮的多个惰轮提取器。 惰轮提取器可以包括例如偏振器，光束置换晶体或二向色镜。

公开(公告)号：US09478930B1

公开(公告)日：2016-10-25

申请号：US14840262

申请日：2015-08-31

Applicant: RAYTHEON COMPANY

Inventor： Robert Stultz ,  Brian Boland

IPC: H01S3/067 ,  G02B27/28 ,  H01S3/094

CPC classification number: H01S3/094073 ,  G02B27/1006 ,  G02B27/283 ,  G02B27/286 ,  H01S3/06754 ,  H01S3/094003

Abstract: Method and apparatus for beam coupling. In one example, a beam coupler includes a first beam displacer configured to receive a linearly-polarized signal seed having a first wavelength, and an unpolarized pump beam having a second wavelength, the unpolarized pump beam including first and second linear polarization components, the first beam displacer being further configured to spatially translate the first linear polarization component to co-locate the first linear polarization component with the linearly-polarized signal seed, a second beam displacer configured to spatially translate the second linear polarization component and recombine the first and second linear polarization components of the unpolarized pump beam, and to co-locate the unpolarized pump beam with the linearly polarized signal seed, and a dual-wavelength waveplate interposed between the first and second beam displacer, and configured to rotate polarizations of each of the first linear polarization component, second linear polarization component, and linearly-polarized signal seed.

Abstract translation: 光束耦合的方法和装置。 在一个示例中，光束耦合器包括被配置为接收具有第一波长的线性偏振信号种子的第一光束置换器和具有第二波长的非偏振泵浦光束，所述非偏振泵浦光束包括第一和第二线性偏振分量，第一 光束置换器还被配置为空间地平移第一线性偏振分量以将第一线性偏振分量与线性偏振信号种子共同定位，第二光束置换器被配置为空间地平移第二线性偏振分量并将第一和第二线性 所述非偏振泵浦光束的偏振分量，以及将所述非偏振泵浦光束与所述线性偏振信号种子共同定位，以及插入所述第一和第二光束置换器之间的双波长波片，并且被配置为旋转所述第一线性 偏振分量，第二线性偏振分量和线性 ly极化信号种子。

公开(公告)号：US20160026066A1

公开(公告)日：2016-01-28

申请号：US14340688

申请日：2014-07-25

Applicant: RAYTHEON COMPANY

Inventor： Robert Stultz ,  Brian Boland

IPC: G02F1/39 ,  G02F1/35 ,  G02F1/355

CPC classification number: G02F1/39 ,  G02F1/3501 ,  G02F1/3544 ,  G02F2001/3503 ,  G02F2001/3507 ,  G02F2001/392 ,  G02F2202/40

Abstract: An optical parametric amplifier and methods for idler extraction therein. Certain examples provide a method of extracting the idler at intermediate points within the optical parametric amplifier chain to improve conversion efficiency and/or maintain high beam quality (high Strehl ratio), where the pump beam has non-uniform profile. In one example, optical parametric amplifier includes an amplifier chain having a plurality of gain stages, each gain stage including a non-linear optical crystal, the plurality of gain stages configured to receive a signal seed and a pump beam and to produce an idler and an amplified signal, the pump beam having a non-uniform spatial profile, and a plurality of idler extractors interspersed with the plurality of gain stages and configured to extract the idler from intermediate points within the amplifier chain. The idler extractors can include polarizers, beam displacer crystals, or dichroic mirrors, for example.

Abstract translation: 一种光学参量放大器及其中的惰轮提取方法。 某些示例提供了一种在光学参量放大器链中的中间点提取惰轮的方法，以提高转换效率和/或保持高光束质量（高Strehl比），其中泵浦光束具有不均匀的轮廓。 在一个示例中，光学参量放大器包括具有多个增益级的放大器链，每个增益级包括非线性光学晶体，所述多个增益级被配置为接收信号种子和泵浦光束并产生惰轮和 放大信号，泵浦光束具有不均匀的空间分布，以及散布在多个增益级中并被配置为从放大器链中的中间点提取惰轮的多个惰轮提取器。 惰轮提取器可以包括例如偏振器，光束置换晶体或二向色镜。

公开(公告)号：US20200371240A1

公开(公告)日：2020-11-26

申请号：US16419768

申请日：2019-05-22

Applicant: Raytheon Company

Inventor： Arthur M. Newman ,  Eran Marcus ,  Brian Boland

IPC: G01S17/89 ,  G01S7/486 ,  G01S17/08 ,  G01J1/44

Abstract: A measured photo-event array is converted from two spatial coordinates and one temporal coordinate into three spatial coordinates for real-time imaging. Laser light pulses illuminate at least one object, and a Geiger-mode avalanche photodiode array receives photons from laser light reflected off the object. For each pulse of the laser light, the GMAPD outputs a first array of photo-events representative of reflected photons. A three-dimensional (3D) Gaussian distribution kernel arranged as a list of array locations to be processed and weight list(s) are provided. The weight list(s) specify an amount array values are scaled based on the Gaussian distribution or photon arrival time. A graphics processing unit arranges the first array of measured photo-events as a list, convolves the Gaussian displacement list with the list of measured photo-events to produce a convolution output, and applies weights from the weight list(s) to the values to produce a density point cloud.