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Coherent laser radar system of high-resolution measurement of remote object

A high-resolution, laser radar technology, applied in the field of coherent laser radar systems, can solve the problems of inability to achieve high-speed resolution measurement, high peak power narrow pulse does not have large time width characteristics, etc., to meet the needs of laser power, The effect of high detection sensitivity and high range resolution

Inactive Publication Date: 2016-12-14
CHENGDU UNIV OF INFORMATION TECH
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Problems solved by technology

However, narrow pulses with high peak power do not have large time-width characteristics, making linear frequency modulation pulse coherent methods unable to achieve high-velocity resolution measurements

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  • Coherent laser radar system of high-resolution measurement of remote object

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Embodiment Construction

[0019] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0020] The application principle of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0021] refer to figure 1 The coherent laser radar system for measuring remote targets with high resolution consists of: a narrow linewidth seed light source 1, a dual parallel phase modulator 2, a radio frequency signal source 3, a first optical fiber splitter 4, a second optical fiber splitter 5, Acousto-optic modulator 6, third fiber beam splitter 7, fiber amplifier 8, first collimator 9, polarizing beam splitter 10, quarter wave plate 11, optical antenna 12, second collimator 13 ,...

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Abstract

The present invention discloses a coherent laser radar system of high-resolution measurement of a remote object. The system comprises a narrow linewidth seed light source, a double parallel phase modulator, a radio frequency signal source, a fiber beam splitter, an acoustic optical modulator, a collimator, a polarized light beam splitter, a quarter-wave plate, an optical antenna, a 2*2 fiber optic combiner, a balance detector and a signal processing module. The coherent laser radar system of high-resolution measurement of remote object can perform high-resolution measurement of the distance and the speed of the remote object. The coherent laser radar system of high-resolution measurement of remote object is high in detection sensitivity, high in distance resolution, high in speed resolution, has a laser all-fiber structure and the output line polarization high peak power laser, and has a wide application prospect in the national defense and civil detection fields.

Description

technical field [0001] The invention belongs to the technical field of laser radar, in particular to a coherent laser radar system for measuring remote targets with high resolution. Background technique [0002] Laser detection and ranging technology (Light Detection and Ranging, lidar), also known as lidar technology, after decades of development, mainly formed the following distance and speed measurement methods: (1) direct measurement of flight time; 2) Phase detection type AM continuous wave ranging; (3) Chirped AM continuous wave; (4) Pulse Doppler coherent detection; (5) Frequency modulated continuous wave coherent detection; (6) Wavelength tuned continuous wave coherent detection; (7) Broadband phase-encoded pulse coherent detection; (8) Frequency modulated pulse coherent detection. Among them, the time-of-flight direct measurement method is the most commonly used ranging method, and the ultra-long-range high-precision ranging system can reach mm-level accuracy; the ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/58
CPCG01S17/58
Inventor 伍波李琨张福贵
Owner CHENGDU UNIV OF INFORMATION TECH
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