Ultraviolet three-frequency high spectrum resolution laser radar system based on F-P etalon and detection method thereof

An etalon and hyperspectral technology, applied in lidar system and its detection field, can solve the problems of large inversion error, uncoverable detection range, and low detection accuracy.

Active Publication Date: 2017-09-22
YANCHENG TEACHERS UNIV
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Problems solved by technology

Therefore, in order to overcome the shortcomings of the traditional single-parameter detection technology such as low detection accuracy, inability to cover the detection range, or large inversion error, it is necessary to explore the atmospheric wind field that can simultaneously detect high-precision 0-35 km altitudes (troposphere and lower stra

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  • Ultraviolet three-frequency high spectrum resolution laser radar system based on F-P etalon and detection method thereof
  • Ultraviolet three-frequency high spectrum resolution laser radar system based on F-P etalon and detection method thereof
  • Ultraviolet three-frequency high spectrum resolution laser radar system based on F-P etalon and detection method thereof

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[0038] Structural frame of the present invention is as shown in figure 1. figure 1 The middle seed injection light source (1) is connected to the seed light drive power supply (49) and the trigger circuit (51) respectively, and the seed light emitted by the seed injection light source (1) passes through the first convex lens (2), optical isolator (3), After the acousto-optic frequency shifter (4), the second convex lens (5), and the third convex lens (6), a pulsed Nd:YAG laser (7) is injected to emit 355nm linearly polarized pulsed light. The acousto-optic frequency shifter (4) is connected with the acousto-optic frequency shifter drive (53), and the optical frequency from the acousto-optic frequency shifter (4) is controlled by the drive signal at v 0 , v - =v 0 -2GHz and v + =v 0 Alternate between +2GHz. The pulsed Nd:YAG laser (7) is connected to the laser drive power supply (55), and the light pulse emitted from the pulsed Nd:YAG laser (7) is divided into two beams by...

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Abstract

The invention relates to an ultraviolet three-frequency high spectrum resolution laser radar system based on three-channel FP etalon and a detection method thereof, wherein the system and the method can be used to simultaneously detect a 0-35km height wind field, a temperature and an aerosol in a high precision mode. The system is characterized in that an emission laser frequency is alternatively changed among v0, v0-2GHz and v0+2GHz; channels L, 1 and 2 of the etalon are designed into one body, a free spectral spacing is 8GHz, spectral widths are 0.2GHz, 1GHz and 1GHz, 1-L and 1-2 peak to peak intervals are 0.1GHz and 4GHz; the v0 is locked at a peak value of the channel 1; and a quarter wave plate and a polarizing beam splitter prism form a cascading light path. The system and the method have advantages that a single radar can simultaneously measure the 0-35km height wind field, the temperature and the aerosol in the high precision mode; and disadvantages that detection precision of a single parameter detection technology is not high, a detection range can not be covered and three parameters mutually influence each other so that an inversion error is large are overcome.

Description

technical field [0001] The present invention relates to a laser radar system capable of simultaneously detecting wind field, temperature and aerosol at a height of 0-35km with high precision and a detection method thereof, in particular to an ultraviolet three-frequency high spectral resolution laser radar system based on an F-P etalon and its detection method. Background technique [0002] Atmospheric wind speed, temperature, vertical profile of aerosol optical properties and their time evolution characteristics data play a vital role in numerical weather prediction, atmospheric science, climate change, atmospheric thermodynamics, dynamics and other research. It is of great scientific significance to detect and study the atmospheric wind field, temperature and aerosol optical properties. In particular, with the development of near-space vehicles, the security of the space environment has become an important issue. The complex changes of stratospheric atmospheric wind fiel...

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Application Information

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IPC IPC(8): G01S17/95G01S7/481G01S7/497
CPCG01S7/481G01S7/497G01S17/95Y02A90/10
Inventor 沈法华
Owner YANCHENG TEACHERS UNIV
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