公开(公告)号：US20220229343A1

公开(公告)日：2022-07-21

申请号：US17150797

申请日：2021-01-15

Applicant: Raytheon Company

Inventor： Richard L. Kendrick ,  Joseph Marron

IPC: G02F1/295 ,  G01M11/00

Abstract: A method includes illuminating a photonic integrated circuit (PIC) of a transmit aperture of a laser communication terminal and a PIC of a receive aperture of the laser communication terminal with multi-wavelength light, where each PIC includes multiple antenna elements forming an optical phased array (OPA). The method also includes determining light intensities of different wavelengths of the multi-wavelength light after the multi-wavelength light has passed through each PIC. The method further includes estimating phases of light associated with the antenna elements based on variations in the light intensities. In addition, the method includes adjusting one or more phase shifters of at least one of the PICs based on the estimated phases of light.

公开(公告)号：US10996336B2

公开(公告)日：2021-05-04

申请号：US14988476

申请日：2016-01-05

Applicant: Raytheon Company

Inventor： Joseph Marron ,  Maurice J. Halmos ,  Justin S. Grayer ,  David N. Sitter, Jr. ,  Gamze Erten

IPC: G01S17/89 ,  G01S17/58 ,  G01S7/481 ,  F41H13/00

Abstract: A coherent imaging system produces coherent flood illumination directed toward a remote object and local oscillator (LO) illumination derived based on a same master oscillator as the flood illumination. A Doppler sensor receives the LO illumination and a return of flood illumination reflected off the object. Doppler shift data from the Doppler sensor, corresponding to a longitudinal velocity of the object relative to the imaging system, is used to produce Doppler-shifted LO illumination received by a low bandwidth, large format focal plane array (FPA), together with the return illumination from the object. Interference between the Doppler-shifted LO illumination and the return illumination facilitates producing an image of the object with the low bandwidth FPA despite the longitudinal velocity. Pixel intensities from the FPA are integrated over a period approaching the maximum interference frequency. The Doppler sensor and FPA may concurrently process return for a high energy laser target spot.

公开(公告)号：US10754038B2

公开(公告)日：2020-08-25

申请号：US16403821

申请日：2019-05-06

Applicant: Raytheon Company

Inventor： Joseph Marron ,  Maurice J. Halmos ,  Justin S. Grayer ,  Gamze Erten ,  David N. Sitter, Jr.

IPC: H04N7/18 ,  G01S17/89 ,  H01S3/00 ,  H04N5/33 ,  G01S7/48 ,  G01P3/36 ,  G01S17/58 ,  F41H13/00 ,  G01S7/481 ,  G01S7/4912 ,  G01S7/497 ,  G01S17/66

Abstract: An apparatus includes at least one processor configured to determine a wavefront phase profile of return illumination reflected from a remote object, where the wavefront phase profile is based on interference between Doppler-shifted local oscillator (LO) illumination and the return illumination. The at least one processor is also configured to calculate a wavefront error based on a comparison between (i) the determined wavefront phase profile of the return illumination and (ii) a desired wavefront phase profile of a high energy laser (HEL) beam. The at least one processor is further configured to control a deformable mirror to at least partially compensate the HEL beam for the calculated wavefront error.

公开(公告)号：US10725156B2

公开(公告)日：2020-07-28

申请号：US15698381

申请日：2017-09-07

Applicant: Raytheon Company

Inventor： Maurice J. Halmos ,  Joseph Marron ,  Jae H. Kyung

IPC: G01C3/08 ,  G01S7/4865 ,  G01S7/481 ,  G01S17/58 ,  G01S17/10 ,  G01S7/4861 ,  G01S7/484 ,  G01S7/487 ,  G01S7/48

Abstract: A method includes generating a first optical signal containing doublet pulses. Each doublet pulse includes a first pulse and a second pulse. The second pulses of the doublet pulses are in quadrature with the first pulses of the doublet pulses. The method also includes transmitting the first optical signal towards a target and receiving a second optical signal containing reflected doublet pulses from the target. Each reflected doublet pulse includes a first reflected pulse and a second reflected pulse. The method further includes performing in-phase and quadrature processing of the first and second reflected pulses and identifying one or more parameters of the target based on the in-phase and quadrature processing.

公开(公告)号：US20160266243A1

公开(公告)日：2016-09-15

申请号：US14643719

申请日：2015-03-10

Applicant: Raytheon Company

Inventor： Joseph Marron

IPC: G01S7/486

CPC classification number: G01S7/4863 ,  G01S7/4865 ,  G01S7/4914 ,  G01S7/4917 ,  G01S13/89

Abstract: A frequency modulated (coherent) laser detection and ranging system includes a read-out integrated circuit formed with a two-dimensional array of detector elements each including a photosensitive region receiving both return light reflected from a target and light from a local oscillator, and local processing circuitry sampling the output of the photosensitive region four times during each sample period clock cycle to obtain quadrature components. A data bus coupled to one or more outputs of each of the detector elements receives the quadrature components from each of the detector elements for each sample period and serializes the received quadrature components. A processor coupled to the data bus receives the serialized quadrature components and determines an amplitude and a phase for at least one interfering frequency corresponding to interference between the return light and the local oscillator light using the quadrature components.

Abstract translation: 频率调制（相干）激光检测和测距系统包括形成有检测器元件的二维阵列的读出集成电路，每个检测器元件包括接收来自目标反射的返回光和来自本地振荡器的光的光敏区域，以及局部 处理电路在每个采样周期时钟周期内对感光区域的输出进行四次采样以获得正交分量。 耦合到每个检测器元件的一个或多个输出的数据总线从每个采样周期的每个检测器元件接收正交分量，并串行接收的正交分量。 耦合到数据总线的处理器接收串行化的正交分量，并使用正交分量来确定对应于返回光和本地振荡器光之间的干扰的至少一个干扰频率的振幅和相位。