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A high-speed laser pulse sampling detection circuit, system and method

A technology of laser pulse and detection circuit, which is applied in the direction of radio wave measurement system, measurement device, electromagnetic wave re-radiation, etc., can solve the problem of accurate sampling and detection without high-speed laser pulse

Active Publication Date: 2020-10-27
PHOTONIC TECH SHANGHAI CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a high-speed laser pulse sampling and detection circuit, system and method for solving the problem that there is no effective solution in the prior art to realize accurate sampling and detection of high-speed laser pulses. question

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  • A high-speed laser pulse sampling detection circuit, system and method
  • A high-speed laser pulse sampling detection circuit, system and method
  • A high-speed laser pulse sampling detection circuit, system and method

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Embodiment 1

[0051] Such as figure 1 As shown, the present embodiment provides a high-speed laser pulse sampling detection circuit, and the sampling detection circuit 10 includes:

[0052] A laser driver 100, configured to generate a laser pulse signal driven by a trigger signal;

[0053] A photoelectric converter 200, connected to the output end of the laser driver 100, for converting the laser pulse signal into a current pulse signal;

[0054] A linear transimpedance amplifier 300, connected to the output end of the photoelectric converter 200, for amplifying the current pulse signal and converting it into a voltage pulse signal;

[0055] A low-speed analog-to-digital converter 400, connected to the output end of the linear transimpedance amplifier 300, for sampling the voltage pulse signal driven by a sampling clock signal and performing analog-to-digital conversion to it;

[0056] The peak power / half-peak pulse width detector 500 is connected to the output end of the low-speed analog...

Embodiment 2

[0091] Such as figure 1 As shown, this embodiment provides a laser radar / 3D sensor system, the laser radar / 3D sensor system includes: a transmitter and a receiver, wherein the transmitter includes: the high-speed laser as described in Embodiment 1 The pulse sampling and detection circuit 10 is used for sampling and detecting the laser pulse signal to obtain its peak power and half-peak pulse width.

[0092] As an example, such as figure 1 As shown, the transmitting end also includes: a peak power / half-peak pulse width regulator 20, connected to the output end of the peak power / half-peak pulse width detector 500 and the control end of the laser driver 100, for An adjustment control signal is generated according to the detected peak power and half-peak pulse width to control the peak power and half-peak pulse width of the laser pulse signal output by the laser driver 100 . Specifically, under the driving of the trigger signal, the laser driver 100 adjusts the peak power and th...

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Abstract

The present invention provides a high-speed laser pulse sampling detection circuit, system and method. The circuit includes: a laser driver that generates laser pulses driven by a trigger signal; a photoelectric converter connected to the laser driver that converts the laser pulses into current pulses; The linear transimpedance amplifier connected to the photoelectric converter amplifies the current pulse and converts it into a voltage pulse; the low-speed analog-to-digital converter connected to the linear transimpedance amplifier samples the voltage pulse under the sampling clock signal and performs analog-to-digital conversion on it ;Connected to the peak power / half-peak pulse width detector of the low-speed analog-to-digital converter to detect the output signal of the low-speed analog-to-digital converter to obtain the peak power and half-peak pulse width of the laser pulse; connected to the low-speed analog-to-digital converter The multi-phase clock generator generates a sampling clock signal whose phase changes continuously according to the trigger signal. The invention solves the problem that there is no effective solution in the prior art to realize accurate sampling and detection of high-speed laser pulses.

Description

technical field [0001] The invention relates to a 3D sensor and a laser radar system, in particular to a high-speed laser pulse sampling detection circuit, system and method. Background technique [0002] Applications such as autonomous driving, gesture recognition, and machine vision all require high-precision, high-resolution, and real-time ranging functions. Therefore, laser radar and 3D imaging technologies based on TOF (photon time-of-flight) have been more and more widely used. . [0003] TOF-based lidar and 3D imaging technology consists of a transmitter and a receiver. The transmitting end generates a pulse-modulated laser signal, and the receiving end detects the light signal reflected from the target object, and calculates the distance of the target object according to the flight time of the photon. In the dTOF (direct photon time of flight) system, the detection distance and accuracy are mainly affected by the peak power and half-peak pulse width of the optical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/4861G01S7/4865
CPCG01S7/4861G01S7/4865G01S7/484G01S17/10G01S7/497G01S17/894G01S7/4814
Inventor 陈学峰王宇伟栗源夏韬吴祎璠姜培
Owner PHOTONIC TECH SHANGHAI CO LTD