All-fiber Doppler lidar wind field detection system and method

Abstract

An all-fiber Doppler lidar wind field detection system comprises a laser emission system, an optical receiving system, a frequency discrimination and optical detection system and a signal processing system, wherein the frequency discrimination and optical detection system is connected with the signal processing system; the laser emission system and the optical receiving system are connected with the frequency discrimination and optical detection system through multi-mode/single-mode converters; the laser emission system emits laser light into the atmosphere; the optical receiving system receives backscattering light of atmospheric molecules and couples the backscattering light into multimode fibers, then, the backscattering light is fed into the signal processing system after entering the frequency discrimination and optical detection system for processing through the multi-mode/single-mode converters, and wind speed information is obtained after the backscattering light is processed. A fiber M-Z interferometer is used as a frequency detector, the wavelength range is wide, the selectivity of a laser light source is high, the ability to resist external interference is high, and spectral resolution and light splitting efficiency are high; in this way, the stability of detection is improved, detection accuracy is high, and the all-fiber Doppler lidar wind field detection system is convenient to use.

Description

technical field [0001] The invention belongs to the technical field of wind field detection systems, relates to an all-fiber Doppler laser radar wind field detection system, and also relates to a detection method using the system. Background technique [0002] Wind field is an important meteorological parameter and atmospheric dynamics parameter, which is closely related to climate change and the occurrence of various abnormal climate phenomena. The research on high-temporal and large-scale fine wind field detection technology has always been an important research goal of lidar remote sensing And one of the cutting-edge technologies. [0003] Lidar, as a new technology with high spatial-temporal resolution and clear-sky detection of wind field, is receiving extensive attention and capital investment from all over the world. Countries such as NASA and ESA of the European Space Agency have successively developed ground-based, airborne and spaceborne lidar wind measurement tec...

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Problems solved by technology

[0006] The purpose of the present invention is to propose an all-fiber Doppler laser radar wind field detection system, which solves the problems in the prior art that the mechanism is huge, the structure is complex, and the detection results are unstable.

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