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Molecular scattering Doppler lidar for coherent optical paths

A Doppler laser and molecular scattering technology, which is applied in the fields of photoelectric detection, atmospheric detection, and laser remote sensing, can solve problems such as the inability to measure wind speed in the upper atmosphere, and achieve the effects of small size, strong environmental adaptability, and small pulse width

Active Publication Date: 2015-11-18
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

[0010] It can be seen that at present, most airborne wind lidars in the world use coherent Doppler measurement, but coherent measurement can only measure the scattering signal of aerosol particles, and cannot measure wind speed in the upper atmosphere where aerosols are scarce such as the stratosphere

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  • Molecular scattering Doppler lidar for coherent optical paths

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Embodiment

[0025] figure 1 A structural schematic diagram of a molecular scattering Doppler lidar with a coherent optical path provided by an embodiment of the present invention. Such as figure 1 As shown, it mainly includes: tunable pulse laser 1, first and second fiber beam splitters (2 and 8), beam expander 3, polarization beam splitter 4, λ / 4 wave plate 5, transmission telescope 6, Converging lens 7 and laser frequency measuring device 9; wherein:

[0026] The tunable pulsed laser 1, the first optical fiber beam splitter 2, the beam expander 3, the polarization beam splitter 4, the λ / 4 wave plate 5 and the transmission telescope 6 are connected in sequence; one end of the polarization beam splitter 4 is also A converging lens 7 is connected; the A port of the second optical fiber beam splitter 8 is connected to the first optical fiber beam splitter 2, the B port is connected to the converging lens 7, and receives the parallel beam converged by the converging lens 7, and the C port ...

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Abstract

The invention discloses a molecular scattering Doppler lidar for coherent optical paths, comprising a tunable pulse laser, first and second optical fiber beam splitters, a beam expander, a polarization beam splitter, a lambda / 4 wave plate, a transmission telescope, a converging lens, and a laser frequency measuring device. The tunable pulse laser, the first optical fiber beam splitter, the beam expander, the polarization beam splitter, the lambda / 4 wave plate and the transmission telescope are connected in sequence. A port A of the second optical fiber beam splitter is connected with the first optical fiber beam splitter, a port B is connected with the polarization beam splitter through the converging lens, and a port C is connected with the laser frequency measuring device. The molecular scattering Doppler lidar disclosed by the invention has the advantages of low development cost and small size.

Description

technical field [0001] The invention relates to the fields of laser remote sensing, atmospheric detection and photoelectric detection, in particular to a molecular scattering Doppler lidar with a coherent optical path. Background technique [0002] With its high resolution, high precision, large detection range, and ability to provide three-dimensional wind field information, Doppler wind lidar has attracted the attention and attention of many countries in the world, and invested a lot of manpower and material resources in research . According to different detection methods, Doppler wind lidar technology can be divided into coherent technology and non-coherent (direct detection) technology. [0003] Molecular scattering Doppler lidar with coherent optical path has the characteristics of low cost, strong mobility, and high adaptability. It has a wide range of applications in meteorological science, business, and military. The early stage that radar must go through. At pres...

Claims

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Application Information

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IPC IPC(8): G01S17/95
CPCG01S17/95Y02A90/10
Inventor 张楠楠孙东松窦贤康陈廷娣郑俊赵若灿李建阅周颖捷
Owner UNIV OF SCI & TECH OF CHINA
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