A tuning method and device for a ring-down cavity

Abstract

The invention provides an adjusting device and an adjusting method for a ring-down cavity so as to solve the technical problems that an existing adjusting process of the ring-down cavity is lack of convenient and reasonable adjusting equipment and a high-precision and high-stability adjusting process cannot be formed. The device comprises an indicating light source generator, a small aperture slot, a visible light frequency band reflector group, a detection light source reflector, a detector and an adjustable small aperture slot, wherein the indicating light source generator is used for forming an indicating light source of a visible light frequency band; the small aperture slot is used for restricting indicating light and judging adjusting accuracy on an indicating light source light path; the visible light frequency band reflector group is used for adjusting the direction of the indicating light source light path; the detection light source reflector is used for changing a detectionlight source light path on the indicating light source light path to form a reflection light path of the detection light source light path; the detector is used for receiving detection light on the reflection light path to carry out signal identification; and the adjustable small aperture slot is used for optical axis calibration of detection light output by the ring-down cavity and adjacent indicating light. An accessory component is avoided from being added between a detection light source and the ring-down cavity, the system-level reliability of the ring-down cavity is guaranteed, and the personal error and adjusting difficulty in the adjusting process of the ring-down cavity are overcome.

Description

technical field [0001] The invention relates to the technical field of laser spectrum adjustment, in particular to a ring-down cavity adjustment device and an installation method. Background technique [0002] In the prior art, cavity ring-down spectroscopy (CRDS) has high-sensitivity spectral resolution. In the CRDS device, the ring-down cavity is an indispensable component unit and is also the most precise structure. Since the ring-down cavity is mostly a resonant cavity using the interference principle of light, it requires high adjustment accuracy. [0003] At present, the installation and adjustment of the ring-down cavity is basically realized by the experience of the experimenters and the existing components. For the ring-down optical path whose absorption wavelength of the gas to be measured is in the visible light band, the detection light source can be directly used for installation and adjustment. However, since gases have relatively abundant over-frequency absor...

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the embodiment of the present invention provides a ring-down cavity adjustment device and adjustment method to solve the problem that the existing ring-down cavity adjustment process lacks convenient and reasonable adjustment equipment and cannot form a high-precision and high-stability adjustment process technology question

Images