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Single-wavelength four-Raman laser radar detection system and detection method

A Raman laser and detection system technology, applied in radio wave measurement systems, measurement devices, electromagnetic wave re-radiation and other directions, can solve problems such as system damage and large measurement errors in low-level atmospheric detection

Active Publication Date: 2015-09-02
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

However, the Achilles heel of this product is that its design structure will reflect the emitted laser light to the cathode surface of the detector, causing system damage, and its long transition zone will lead to large measurement errors in the detection of the lower atmosphere

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  • Single-wavelength four-Raman laser radar detection system and detection method
  • Single-wavelength four-Raman laser radar detection system and detection method
  • Single-wavelength four-Raman laser radar detection system and detection method

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Embodiment Construction

[0037] Such as figure 1 As shown, the single-wavelength four-Raman lidar detection system includes a control unit, a laser emitting unit, an optical receiving unit, and a signal detection and acquisition unit, wherein:

[0038] The laser emitting unit includes Nd:YAG laser, double frequency crystal, triple frequency crystal, total reflection mirror R1, 3x beam expander, transmitter, Nd:YAG laser emits triple frequency 355nm pulse laser, Nd:YAG laser The control terminal of the Nd:YAG laser is connected to the control unit, and the output optical path of the Nd:YAG laser is sequentially set with a double frequency crystal, a triple frequency crystal, and a total reflection mirror R1. The light incident end of the beam expander is located on the reflection optical path of the total reflection mirror R1. The beam expander is composed of a pair of optical mirrors R2 and R3 that are parallel to each other and installed on the two-dimensional adjustable optical frame respectively. T...

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Abstract

The invention discloses a single-wavelength four-Raman laser radar detection system and a detection method. The system combines three laser radar technologies of atmospheric temperature measurement via pure-rotation Raman scattering, vapor measurement via vibration Raman scattering, and measurement of atmosphere aerosol optical characteristics via Raman Mie scattering and an inversion method. The laser radar system employs 355 nm single-wavelength pulse laser as a detection light source and a large-diameter optical reception telescope with high transmittance for measuring the wavelength to collect atmospheric back scattering light signals, four wavelength atmospheric Raman scattering light signals and Mie scattering echo light signals of 353 nm, 354 nm, 355 nm, 386 nm, and 407 nm are mutually separated via an angle separation method of color separation filters and interference filters by a following optical path, the above five-wavelength scattering light signals are gated via narrowband interference filters, photoelectric conversion of photomultipliers of the same type is accomplished, and data acquisition is accomplished by a five-channel data collector.

Description

technical field [0001] The invention relates to the field of laser atmospheric remote sensing, in particular to a single-wavelength four-Raman laser radar detection system and a detection method. Background technique [0002] Atmospheric temperature is one of the important parameters describing the stability of the atmosphere, which characterizes the degree of stability of the atmosphere. Atmospheric water vapor is an important greenhouse gas for the Earth, affecting the global water cycle, atmospheric chemical processes, weather systems, and climate change. Atmospheric aerosol is a general term for liquid and solid particles suspended in the atmosphere, which mainly affect the global climate and local air quality through direct and indirect effects. Atmospheric temperature, water vapor, and aerosols are the main parameters describing atmospheric conditions, which interact and jointly determine short-term air quality, local meteorological differences, and long-term climate ...

Claims

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Application Information

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IPC IPC(8): G01S17/95
CPCG01S17/95Y02A90/10
Inventor 王英俭谢晨波赵明尚震钟志庆王邦新王珍珠伯广宇董吉辉刘东
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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