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Laser radar system for simultaneously detecting multiple atmospheric parameters at high precision on the basis of three-channel F-P etalon

A technology for detecting lasers and etalons, applied to radio wave measurement systems, measurement devices, climate sustainability, etc., can solve problems such as errors, large wind speed inversions, and insufficient use of F-P reflection signal frequency discrimination capabilities, etc., to reduce Influence, improve the detection signal-to-noise ratio, and achieve the effect of absolute measurement

Inactive Publication Date: 2016-02-17
YANCHENG TEACHERS UNIV
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Problems solved by technology

In this way, due to the uncertainty of assumed parameters, large wind speed inversion errors
In addition, existing systems do not take full advantage of the frequency discrimination capabilities of reflected signals from F-P etalons

Method used

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  • Laser radar system for simultaneously detecting multiple atmospheric parameters at high precision on the basis of three-channel F-P etalon
  • Laser radar system for simultaneously detecting multiple atmospheric parameters at high precision on the basis of three-channel F-P etalon
  • Laser radar system for simultaneously detecting multiple atmospheric parameters at high precision on the basis of three-channel F-P etalon

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Embodiment Construction

[0012] exist figure 2Among them, the external-cavity semiconductor laser (1) is connected to the seed laser drive power supply (41) and the trigger circuit (43) respectively, and the seed laser emitted by the external-cavity semiconductor laser (1) passes through the first convex lens (2), the first After the optical isolator (3), the second convex lens (4), the third convex lens (5), the horn-shaped diode amplifier (6), and the second optical isolator (7), the beam splitter (8) is divided into two beams, After the transmitted light beam is expanded by the beam expander (9), after passing through the 45-degree reflector (10) in the Cassegrain telescope (13), it shoots to the two-dimensional scanner along the optical axis of the Cassegrain telescope (13) (11), after the two-dimensional scanner (11) guides the light, enters the atmosphere detection area vertically through the glass plate (12), and the first reflector of the two-dimensional scanner (11) and the Cassegrain telesc...

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Abstract

The invention relates to a laser radar system for simultaneously detecting multiple atmospheric parameters at high precision on the basis of a three-channel F-P etalon. The laser radar system is characterized in that the channel I, the channel II, and the channel III of the three-channel F-P etalon are designed for signal separation, wind speed detection, and temperature detection respectively; atmospheric back-scattered light enters the channel I of the etalon via a branch of a third 1*2 optical fiber coupler and the a-to-b path of a first optical circulator so as to be separated; a Mie signal transmits and enters the channel II of the etalon; transmission and reflection signals of the channel II are simultaneously received by using a second optical circulator; a Rayleigh signal is reflected and enters the combining end of a fifth 1*2 optical fiber coupler via the b-to-c path of the first optical circulator and most signals enter the channel III of the etalon via a branch of the fifth 1*2 optical fiber coupler. The laser radar system has advantages of simultaneously detecting atmospheric parameters, such as the atmospheric wind field, the temperature, and the aerosol optical characteristics of the troposphere at high precision, and overcoming defects of large inversion errors or low detection precision of conventional single-parameter detection technology.

Description

technical field [0001] The invention relates to a multi-atmospheric parameter simultaneous high-precision detection laser radar system, in particular to a multi-atmospheric parameter simultaneous high-precision detection laser radar system based on a three-channel F-P etalon. Background technique [0002] At present, the detection of aerosol mainly includes meter scattering lidar, polarization lidar and high spectral resolution lidar. Since the laser echo signal contains the information of two atmospheric parameters, the scattering coefficient and the extinction coefficient, it is necessary to make some assumptions about the atmospheric state at that time during the inversion process, such as assuming the lidar ratio. However, there are often large deviations between these hypothetical values ​​and the true values, resulting in large deviations in the inversion results. When using the radar equation to invert the aerosol extinction coefficient, the polarized lidar still nee...

Claims

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Application Information

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IPC IPC(8): G01S17/95
CPCG01S17/95Y02A90/10
Inventor 沈法华
Owner YANCHENG TEACHERS UNIV
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