Low-air-pressure excited Raman light source system apparatus

Abstract

The invention discloses a low-air-pressure excited Raman light source system apparatus. The apparatus comprises an ultraviolet pumping laser, a focusing lens, an intelligent air pressure sensing apparatus, an inflating control valve, a low-pressure Raman tube, an impurity filtering apparatus and a laser collimator, wherein the ultraviolet pumping laser emits laser to pass through the focusing lens to be focused into the low-pressure Raman tube and to finally emit to the laser collimator, wherein the low-pressure Raman tube is provided with the intelligent air pressure sensing apparatus for monitoring the air pressure in the low-pressure Raman tube, the inflating control valve used for supplementing air pressure and the impurity filtering apparatus used for removing impurities from air; and the intelligent air pressure sensing apparatus is electrically connected with the inflating control valve. By adoption of low-air-pressure design, the safety of the Raman tube apparatus can be improved; by virtue of design of the intelligent air pressure sensing apparatus and the inflating control valve, constant air pressure in the Raman tube can be ensured, and laser energy stability can be improved; and by virtue of the impurity filtering apparatus, the effective service cycle of the Raman tube is prolonged.

Description

technical field [0001] The invention relates to the technical field of Raman light sources, in particular to a low-pressure stimulated Raman light source system device. Background technique [0002] Raman spectroscopy technology can detect and analyze the composition of substances at the molecular level. It has the advantages of directness, non-destructiveness, and rapidity. This technology has been widely used in commodity inspection, industrial environmental protection, chemistry, biomedicine and other fields. It is an important research direction in the relevant scientific and technological circles. [0003] Chinese Invention Patent Publication No. CN103185712A provides a device for generating multi-wavelength stimulated Raman light. Its core technology is as follows. It consists of a laser and a focusing lens on its output optical path, a Raman tube and collimation components, especially the laser and A frequency multiplier is placed on the optical path between the focu...

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Problems solved by technology

[0004] Among them, the device that generates multi-wavelength stimulated Raman light can emit multi-wavelength light beams. Since the air pressure in the Raman tube is set in advance, the stability of the laser is poor and it is greatly affected by the measurement environment, and Impurities in the optical path gas cannot be removed, resulting in a limited lifespan of the Raman tube

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