Signal receiving system and ozone detecting laser radar

Abstract

The invention discloses a signal receiving system and an ozone detecting laser radar. The signal receiving system receives ozone echo signals received by a plurality of split telescopes through combined optical fibers and processes the ozone echo signals transmitted by the combined optical fibers through a subsequent light path so that light signals can be converted into electric signals, there isno need to design a large number of coupling light paths, photoelectric detectors or collecting devices according to the number of the split telescopes in a combined telescope, and the aims of reducing the cost of a receiving light path of the combined telescope, improving the integrity of the receiving light path and reducing the adjusting difficulty are realized. In addition, a first signal processing module and a second signal processing module of the signal receiving system are symmetrical about of the axis of a chopper disk, and therefore the photoelectric conversion of Rayleigh echo signals or Raman echo signals can be realized by independently adjusting the light paths where the first signal processing module and the second signal processing module are located.

Description

technical field [0001] The present application relates to the technical field of laser radar systems, and more specifically, to a signal receiving system and ozone detection laser radar. Background technique [0002] In recent decades, lidar has developed rapidly in the field of atmospheric detection, especially in China, where the investment in scientific research has increased, and the development of atmospheric detection lidar has sprung up like mushrooms. In 2012, the National Natural Science Foundation of China funded the national major scientific research equipment development project "multi-band multi-atmospheric component active and passive comprehensive detection system", which includes multiple lidar sub-projects, such as aerosol cloud lidar, Rayleigh sodium Wind temperature lidar, ozone detection lidar, pollutant detection lidar, carbon dioxide lidar, etc. Among them, the Rayleigh sodium wind temperature lidar and the ozone detection lidar need to detect the midd...

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Problems solved by technology

[0004] In the prior art, there is no experience for the design of the follow-up receiving optical path of the combined telescope. The traditional design idea for the follow-up receiving optical path of the receiving telescope in the ozone detection lidar system is usually for the echo signal of a single wavelength. A single receiving optical fiber, a set of coupling optical path, a set of photodetector and a set of acquisition device

However, for an ozone detection lidar with a combined telescope, if the follow-up receiving optical path of the combined telescope is still designed according to the traditional design idea, for the echo signal of a single wavelength, it is necessary to design the same number of single telescopes in the combined telescope receiving optical fiber, coupling optical path, photodetector and collection device, then for multiple receiving wavelengths, at least the number of coupling optical paths, photodetectors and collection devices must be multiplied by the number of detection wavelengths on the basis of the above, the combined telescope designed in this way The receiving optical path is not only costly and low in integration, but also difficult to implement and debug later

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