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    • 51. 发明申请
    • PHOTONIC BASED CROSS-CORRELATION HOMODYNE DETECTION WITH LOW PHASE NOISE
    • 基于光子的交叉相关HOMODYNE检测与低相位噪声
    • WO2009064478A2
    • 2009-05-22
    • PCT/US2008/012815
    • 2008-11-13
    • OEWAVES, INC.ELIYAHU, DannyMOROZOV, NikolaiMALEKI, Lutfollah
    • ELIYAHU, DannyMOROZOV, NikolaiMALEKI, Lutfollah
    • H04B10/02H04B10/13
    • H04B10/63G01R31/2824H04B10/61
    • In one aspect, this document provides an implementation of a system for characterizing an oscillator. This system includes an input port that receives an oscillation signal from an oscillator under test; an input port signal splitter that splits the received oscillation signal into a first oscillation signal and a second oscillation signal; a first photonic signal processing branch circuit that processes the first oscillation signal to produce a first branch output signal; a second photonic signal processing branch circuit that processes the second oscillation signal to produce a second branch output signal; a dual channel signal analyzer that receives the first and second branch output signals to measure noise in the received oscillation signal; and a computer controller that controls the first and second photonic signal processing branch circuits and the dual channel signal analyzer to control measurements of the noise in the received oscillation signal.
    • 在一个方面,本文档提供了用于表征振荡器的系统的实现。 该系统包括从被测振荡器接收振荡信号的输入端口; 输入端口信号分离器,其将所接收的振荡信号分离成第一振荡信号和第二振荡信号; 第一光信号处理分支电路,处理所述第一振荡信号以产生第一分支输出信号; 第二光子信号处理分支电路,处理所述第二振荡信号以产生第二分支输出信号; 双通道信号分析器,其接收第一和第二分支输出信号以测量接收的振荡信号中的噪声; 以及计算机控制器,其控制第一和第二光子信号处理分支电路和双通道信号分析器,以控制接收到的振荡信号中的噪声的测量结果。
    • 55. 发明申请
    • DUAL LIDAR AND RADAR PHOTONIC INSTRUMENT
    • WO2022076243A1
    • 2022-04-14
    • PCT/US2021/052956
    • 2021-09-30
    • OEWAVES, INC.
    • MALEKI, Lute
    • G01S7/35G01S13/34G01S13/42G01S13/86G01S17/42
    • A dual Lidar-radar sensor instrument based on a photonic implementation is disclosed. The instrument employs two continuous wave lasers (106, 142) that concurrently provide an optical Lidar signal (112, 144) and a microwave radar signal (154), via a high bandwidth photodetector, PD, (150), for inherent coherence of Lidar and radar functions for data fusion and other purposes. In illustrative examples, the photonic system is integrated as a photonic integrated circuit, PIC. A Lidar device (102) generates a Lidar output beam from a first coherent optical beam modulated at a first modulator (108) by a waveform provided by a waveform generator (110) and introduced into transmit optics (120) for use as a Lidar output signal (122). A radar device (104) generates a radar output signal from a combined optical beam formed from a portion of the waveform-modulated first coherent optical beam (112) and the second coherent optical beam (144) and applied high bandwidth PD (150). By controlling the frequencies of the first and second narrow linewidth laser beams, the combined beam applied to the PD (150) can be caused to beat at a desired beat frequency to generate an RF tone at a desired RF frequency. A portion of the combined optical beam is modulated by a return radar signal to provide a radar-modulated optical beam. The radar-modulated optical beam output from second modulator (152) is fed to a third, low bandwidth, PD (164), which generates an electrical baseband signal for application to a radar DSP (168).