Difference absorb laser radar device based on tunable light source

A laser radar, differential absorption technology, applied in the direction of measurement device, electromagnetic wave re-radiation, utilization of re-radiation, etc., can solve the problems affecting measurement stability, measurement error, poor accuracy, etc., to achieve simple structure, low manufacturing cost, accurate Small error effect

Inactive Publication Date: 2014-05-14
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

However, this method and device have some disadvantages: (1) Although the stimulated Raman light source is simple and cheap, the stimulated Raman wavelength is fixed, and the optimal differential wavelength cannot be selected, so the measurement accuracy is re

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  • Difference absorb laser radar device based on tunable light source
  • Difference absorb laser radar device based on tunable light source

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Embodiment Construction

[0014] like figure 1 As shown, a differential absorption lidar device based on a tunable light source includes a pump laser 1 and a pump laser 2 2, and the laser light emitted by the pump laser 1 is transmitted into the tunable laser 2 8 through a plane mirror 2 4 , the laser light emitted by the pump laser 1 is reflected by the plane mirror 2 4 and then reflected by the plane mirror 3 into the tunable laser 1 7, and the laser light emitted by the pump laser 2 2 is transmitted into the tunable laser 3 9 through the plane mirror 3 5, The laser light emitted by the pump laser 2 2 is reflected by the plane mirror 3 5 and then reflected by the plane mirror 4 6 into the tunable laser 4 10, and the laser light emitted by the tunable laser 2 8 is frequency converted by the frequency multiplier 11 and then passed by the plane mirror 10 18 Reflected into the polarizing prism two 20, the laser light emitted by the tunable laser three 9 undergoes frequency conversion through the frequenc...

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Abstract

The invention discloses a difference absorb laser radar device based on a tunable light source. The difference absorb laser radar device comprises a laser, a light path for generating a difference wave length laser beam and related parts for laser beam combination and emission, optical scanning and receiving and signal spectral detection. Particularly, two sets of YAG lasers (1 and 2) are adopted in a laser radar emitting part to serve as a pumping source of four sets of tunable lasers (7, 8, 9 and 10); four paths of laser beams emitted by the tunable lasers are emitted out through one path via a beam combining optical part (19, 20 and 26); a periscope type scanner (28) is adopted to achieve space distribution scanning. The difference absorb laser radar device can fast detect space distribution of pollutant gases including nitrogen dioxide, sulfur dioxide, ozone and the like in the atmosphere with high precision in real time. The difference absorb laser radar device is simple in structure and low in manufacturing cost, and precision errors are small.

Description

technical field [0001] The invention relates to a pollutant profile laser radar measuring device, in particular to a differential absorption laser radar device based on an adjustable light source. Background technique [0002] At present, in order to detect the spatial distribution profile of pollutant gases in the atmosphere, people often use the method of multi-wavelength differential absorption lidar. For example, an invention patent CN 1877308A (announcement date of authorization is December 13, 2006) issued by one of the applicants, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, describes a kind of "vehicle pollution measurement laser radar based on Raman light source device". The device uses a Nd:YAG laser to pump different Raman tubes in time division to generate different stimulated Raman wavelengths for detecting polluted gases. However, this method and device have some disadvantages: (1) Although the stimulated Raman light source i...

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Application Information

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IPC IPC(8): G01S17/88
CPCG01S17/95G01S7/481
Inventor 曹开法胡顺星黄见邵石生林金明苑克娥徐之海
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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