Double-optical-comb atmospheric component detection device based on transmitting and receiving separation of high-orbit satellite platform

Abstract

The invention relates to a double-optical-comb atmospheric component detection device based on transmitting and receiving separation of a high-orbit satellite platform. The device comprises an opticalcomb I, a beam splitter I, an energy monitoring module I, a collimation module I, an optical transmitting telescope, a pointing control module I, a pointing control module II, an optical receiving telescope, a collimation module II, an optical comb II, a beam splitter II, an energy monitoring module II, a collimation module III, a beam combiner, a photoelectric detector module, a radio frequencyanalysis module and a data acquisition and analysis module. According to the invention, a double-optical-comb mode with separated receiving and transmitting is adopted, and the frequency comb teeth ofthe optical comb are fixed at intervals, so that the requirement on the frequency stability of the light source is greatly reduced, and the frequency difference can be flexibly adjusted by adjustingthe optical comb on the ground as required. Column concentration high-precision continuous measurement of specific atmospheric components (such as greenhouse gas or pollution gas) in a plurality of site areas at daytime and at night can be realized, and the device has a wide application prospect in the fields of regional climate research, environmental monitoring, atmospheric chemistry research and the like.

Description

technical field [0001] The invention belongs to the field of laser radar, and in particular relates to a dual optical comb atmospheric component detection device based on a high-orbit satellite platform with separate sending and receiving. Background technique [0002] With the development of modernization, fossil fuel combustion, industrial emissions, and land type changes caused by human activities have caused tremendous changes in the global atmosphere, especially the CO in the atmosphere. 2 、CH 4 and N 2 O and other greenhouse gases not only affect regional air quality, but also have an immeasurable impact on global climate change. [0003] At present, the methods used to detect atmospheric components mainly include active and passive detection, both of which use the spectral absorption characteristics of atmospheric molecules. Passive detection directly analyzes solar radiation absorbed by atmospheric molecules, which is susceptible to all kinds of stray light and ca...

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Problems solved by technology

[0006] In order to solve the problem that the existing earth-satellite long-path absorption measurement cannot carry out long-term effective atmospheric monitoring for a region, the sensitivity is low, and a large satellite tracking system is required

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