Near-infrared all-fiber water vapor differential absorption laser radar

A differential absorption and laser radar technology, which is applied in the direction of material analysis, material analysis, and re-radiation through optical means, can solve the problems of loose and uncompact structure, complex data inversion, and large volume, so as to avoid inconsistent response, The effect of simplifying the inversion algorithm and simplifying the system structure

Pending Publication Date: 2021-05-14
南京泰爱信科技有限公司
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Problems solved by technology

In these bands, molecular Rayleigh scattering has a greater influence and cannot be ignored. Therefore, when detecting water vapor with lidar in this band, not only meter scattering of aerosols, but also Rayleigh scattering of molecules must be considered. The corresponding data inversion very complicated
In addition, the existing water vapor differential absorption lidar system is bulky, loose and not compact, and expensive

Method used

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  • Near-infrared all-fiber water vapor differential absorption laser radar
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  • Near-infrared all-fiber water vapor differential absorption laser radar

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Embodiment Construction

[0023]Next, the technical solutions in the embodiments of the present invention will be described in the following examples, and clearly, as described in Example 1 of the present invention, not all of the embodiments of the invention. Based on the embodiments of the invention, there are all other embodiments obtained without making creative labor without making creative labor premises.

[0024]Such asfigure 1 As shown, the present invention provides a near-infrared full optical fiber water vapor difference absorption laser radar, including: laser light source 1, optical switch 2, pulse generator 3, optical amplifier 4, optical transmission telescope 5, filter 6, detector 7 , The capture card 8 and the data processing module 9; the laser light source 1 and the optical switch 2, the pulse generator 3, the optical amplifier 4, the optical transmission telescope 5, the filter 6, and the detector 7 are sequentially connected, said The detector 7 and the acquisition card 8, the data processi...

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Abstract

The invention discloses a near-infrared all-fiber water vapor differential absorption laser radar, and belongs to the technical field of laser radars. The near-infrared all-fiber water vapor differential absorption laser radar comprises a laser light source used for outputting on-band continuous laser and off-band continuous laser, an optical switch, a pulse generator, an optical amplifier, an optical transceiver telescope, a filter, a detector, an acquisition card and a data processing module. The laser light source adopts a near-infrared long wave band with the wavelength range of 1100-2526 nm as a measurement wave band of water vapor differential absorption, and compared with common near-infrared short waves, molecular Rayleigh signals can be neglected, so that the water vapor inversion precision is improved, and an inversion algorithm is simplified. According to the invention, wavelength division multiplexing is realized by adopting the optical switch, simultaneous detection of on-band and off-band signals is realized, the system structure is simplified, and the system cost is saved.

Description

Technical field[0001]The present invention relates to the field of water vapor laser radar, in particular, to a near-infrared full-optical fiber water vapor difference absorption laser radar.Background technique[0002]Water Vapor is the only substance in the earth atmosphere, and it has played an important role in many atmospheric physics and chemistry. In the convection layer, water vapor affects the formation of aerosols and clouds, and heat exchanges through phase transitions. Water vapor has many absorption bands in the infrared band, so it is the most important greenhouse gas in the atmosphere, and its positive and negative feedback effects a huge impact on temperature changes, contributing about 60% of the greenhouse effect.[0003]The current atmospheric water vapor detection includes sampling detection and remote sensing detection, remote sensing detection, and is divided into passive remote sensing and active remote sensing detection. Among them, passive remote sensing methods...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/95G01S7/481G01S7/483G01N21/3504G01N21/359
CPCG01S17/95G01S7/4818G01S7/483G01N21/3504G01N21/359Y02A90/10
Inventor 张仁俊
Owner 南京泰爱信科技有限公司
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