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    Chip-scale silicon-based hybrid-integrated LiDAR system
    1.
    发明授权
    Chip-scale silicon-based hybrid-integrated LiDAR system 有权

    公开(公告)号：US12032094B2

    公开(公告)日：2024-07-09

    申请号：US17170715

    申请日：2021-02-08

    Applicant: Shanghai Jiao Tong University

    Inventor： Liangjun Lu ,  Weihan Xu ,  Linjie Zhou ,  Jiao Liu ,  Jianping Chen

    IPC: G01S7/48 ,  G01S7/481 ,  G01S17/42 ,  G01S17/88

    CPC classification number: G01S7/4813 ,  G01S7/4818 ,  G01S17/42 ,  G01S17/88

    Abstract: A chip-scale silicon-based hybrid-integrated LiDAR system, wherein a transmitting end thereof sequentially comprises a narrow-linewidth tunable laser source, a silicon-nitride-based beam splitter, a silicon-based phase shifter array and a silicon-nitride-based unidirectional transmitting antenna array w.r.t the optical path. Based on the principle of reciprocity of light propagation, the receiving end thereof sequentially comprises a silicon nitride unidirectional receiving antenna array, a silicon nitride beam splitter and a silicon-based coherent receiving module. It also comprises a backup system and an electric controller as the driver of the phase shifters and the processing module. Modules on the silicon platform and the silicon nitride platform are monolithic integrated in a multilayer sandwiched fashion by means of a tapered silicon/silicon nitride evanescent inter-layer coupler; and a gain chip in the tunable laser module and a silicon nitride waveguide are hybrid-integrated by horizontal coupling.

    Lens and integrated beam transceiver based lidar detection device
    3.
    发明授权
    Lens and integrated beam transceiver based lidar detection device 有权

    公开(公告)号：US11796680B2

    公开(公告)日：2023-10-24

    申请号：US16994383

    申请日：2020-08-14

    Applicant: Shanghai Jiao Tong University

    Inventor： Kan Wu ,  Chao Li ,  Xianyi Cao ,  Jianping Chen

    IPC: G01S7/481 ,  G01S17/894 ,  G02B6/35

    CPC classification number: G01S17/894 ,  G01S7/4813 ,  G01S7/4817 ,  G01S7/4818 ,  G02B6/3548

    Abstract: Lidar detection device based on a lens and an integrated beam transceiver, comprising a laser, a coupling fiber, a substrate, an input waveguide, a connection waveguide, a 1×N optical switch, a switch electrical interface, N switch output waveguides, N transceiving units, an off-chip processor and a lens, wherein N is a positive integer above 2. The invention can realize three-dimensional detection of a target, and the invention has the characteristics of two-dimensional beam steering independent of wavelength switching, low control complexity, low electric power consumption, receiving and emitting monolithic integration and high receiving efficiency, and being compatible with two laser ranging functions of ToF and FMCW.

    Deep learning based method and device for noise suppression and distortion correction of analog-to-digital converters
    6.
    发明授权
    Deep learning based method and device for noise suppression and distortion correction of analog-to-digital converters 有权

    公开(公告)号：US10812095B2

    公开(公告)日：2020-10-20

    申请号：US16132202

    申请日：2018-09-14

    Applicant: Shanghai Jiao Tong University

    Inventor： Weiwen Zou ,  Shaofu Xu ,  Jianping Chen

    IPC: H03M1/06 ,  H03M1/10 ,  G06K9/62 ,  G06N3/08 ,  H03M1/08 ,  H03M1/12

    Abstract: A device for noise suppression and distortion correction of analog-to-digital converters based on deep learning that realizes effect of correcting noise and distortion of analog to digital converters. The method is applied to electronic ADCs or photonic ADCs. It utilizes the learning ability of the deep network to perform system response learning on ADCs which need noise suppression and distortion correction, establishes a computational model in the deep network that can suppress the reconstruction of noises and distorted signals, performs noise suppression and distortion correction on the signals obtained by ADCs, and thereby improves performance of the learned ADCs. The device improves the performance of the microwave photon system with high sampling precision of microwave photon radar and optical communication system.

    Full-spectrum covering ultra wideband all photonics-based radar system
    7.
    发明授权
    Full-spectrum covering ultra wideband all photonics-based radar system 有权

    公开(公告)号：US10605921B2

    公开(公告)日：2020-03-31

    申请号：US15833992

    申请日：2017-12-06

    Applicant: Shanghai Jiao Tong University

    Inventor： Weiwen Zou ,  Hao Zhang ,  Siteng Zhang ,  Jianping Chen

    IPC: G01C3/08 ,  G01S17/88 ,  G01S13/02 ,  G01S7/03 ,  G01S13/26 ,  G01S7/28

    Abstract: A full-spectrum covering ultra wideband full-photonics based radar system comprising a signal transmitter, a transceiver module, and a signal receiver. The signal transmitter comprises a mode-locked laser, a first dispersion module, a first optical coupler, a second optical coupler, a first optical filter, a second dispersion module, a second optical filter, a first adjustable time delay module, a third optical coupler, an optical amplifier, and a first photodetector; the transceiver module comprises a band selector, a first electrical amplifier array, a T/R component array, an antenna array, and a second electrical amplifier array; the signal receiver comprises a third optical filter, a second adjustable time delay module, an electro-optical modulator, a third dispersion module, a second photodetector, an analog-digital conversion module, and a signal processing module. The system has continuous tunability for center frequency, bandwidth, and time width of the wideband signal with high coherence and ranging accuracy.

    ENCODING AND DECODING METHODS FOR HIGH-PRECISION TIME TRANSFER AND ENCODING AND DECODING DEVICES THEREFOR
    8.
    发明申请
    ENCODING AND DECODING METHODS FOR HIGH-PRECISION TIME TRANSFER AND ENCODING AND DECODING DEVICES THEREFOR 有权
    用于高精度时间传输和编码和解码器件的编码和解码方法

    公开(公告)号：US20150093122A1

    公开(公告)日：2015-04-02

    申请号：US14562000

    申请日：2014-12-05

    Applicant: Shanghai Jiao Tong University

    Inventor： Guiling WU ,  Liang Hu ,  Jianguo Shen ,  Weiwen Zou ,  Jianping Chen

    IPC: H04B10/524 ,  H04L25/49

    CPC classification number: H04B10/524 ,  G01S19/00 ,  H03M5/14 ,  H04L1/00 ,  H04L25/00 ,  H04L25/4902

    Abstract: A format for modified IRIB-G time code, with added message fields while preserving pulse width coding rule of the standard IRIG-B time code, having a time interval field for carrying time interval between the local time signal and a received time signal, and a user-defined or padded field for carrying user-defined time and/or control messages. An encoding and a decoding methods and devices for high-precision time transfer, where the modified IRIG-B time code carries more messages, and enabling transmission of timing messages and testing messages of two-way time comparison via a single message channel at the same time, which reduces fluctuation due to encoding and decoding manipulation and correlation with working frequencies via exact synchronization between the on-times of the output encoded time code and the transmitted time signal, and between the on-times of the output decoded time signal and the input time code, and improves precision of time transfer.

    Abstract translation: 用于修改的IRIB-G时间码的格式，具有添加的消息字段，同时保留标准IRIG-B时间码的脉冲宽度编码规则，具有用于承载本地时间信号和接收到的时间信号之间的时间间隔的时间间隔字段，以及 用于承载用户定义的时间和/或控制消息的用户定义或填充字段。 用于高精度时间传输的编码和解码方法和装置，其中修改的IRIG-B时间码携带更多消息，并且通过相同的单个消息信道实现定时消息的传输和双向时间比较的测试消息 时间，其通过编码和解码操作的波动以及通过输出编码时间码的接通时间与发送的时间信号之间的精确同步以及在输出解码时间信号的导通时间与 输入时间码，提高时间传输的精度。

    Integrated two-dimensional multi-beam lidar transmitter based on butler matrix
    9.
    发明授权
    Integrated two-dimensional multi-beam lidar transmitter based on butler matrix 有权

    公开(公告)号：US11874362B2

    公开(公告)日：2024-01-16

    申请号：US17061126

    申请日：2020-10-01

    Applicant: Shanghai Jiao Tong University

    Inventor： Liangjun Lu ,  Chen Zhu ,  Linjie Zhou ,  Jiao Liu ,  Jianping Chen

    IPC: G01S7/4911 ,  G01S7/481 ,  G02B6/12 ,  G02B6/293

    CPC classification number: G01S7/4911 ,  G01S7/4815 ,  G02B6/12007 ,  G02B6/29395

    Abstract: Integrated two-dimensional multi-beam LiDAR transmitter based on the Butler matrix, comprising an tunable laser array, a frequency modulated continuous wave modulator array, an N×N Butler optical matrix network, an N×M optical beam expanding network, an M-path phase shifter array, and an M-path two-dimensional LiDAR emitters. N-path narrow linewidth continuous light output by the tunable laser array passes through the frequency modulated continuous wave modulator array to generate N-path frequency modulated continuous light signals; after processed by the N×N Butler matrix and the N×M optical beam expanding network, energy of each path of the frequency modulated continuous optical signal is evenly distributed to the M-path output ports, and the M-path phase shifter array generates equal-difference phases with continuously tunable phase differences for M-path optical signals, which, with continuously tunable phase differences, are transmitted by M-path two-dimensional LiDAR emitters to realize no more than N different two-dimensional steerable transmitting optical beams.

    Silicon-based integrated optically adjustable delay line based on optical phased array
    10.
    发明授权
    Silicon-based integrated optically adjustable delay line based on optical phased array 有权

    公开(公告)号：US11333826B2

    公开(公告)日：2022-05-17

    申请号：US17039964

    申请日：2020-09-30

    Applicant: Shanghai Jiao Tong University

    Inventor： Linjie Zhou ,  Wensheng Shan ,  Weihan Xu ,  Liangjun Lu ,  Jianping Chen ,  Jiao Liu

    IPC: G02B6/12 ,  G02B6/124 ,  G02F1/29

    Abstract: A silicon- and optical phased array-based integrated optically adjustable delay line, comprising, an optical phased array transmitting unit, a slab waveguide transmitting unit, and an optical phased array receiving unit that are sequentially arranged. By the optical phase control transmitting unit, the phase difference between channels is regulated and controlled via a phase shifter to change a far-field interference light spot and form a wave beam with directivity to regulate and control an incident angle of an optical signal entering the slab waveguide, thus changing the propagation path length of the optical signal. Finally, the optical signal is received by a corresponding optical phased array receiving unit to obtain different delay amounts. Large adjustable delay amount is realized and the delay line has the advantages of simple structure and control and high integration level with high application value in optical communication and microwave photonic and optical signal processing.

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