Cavity adjustment system and cavity adjustment method of laser resonant cavity

Abstract

The invention discloses a cavity adjustment system of a laser resonant cavity, comprising a laser for outputting guidance light, a laser resonant cavity and assistant resetting equipment. The assistant resetting equipment comprises a CCD camera, an image acquisition and processing system and data display equipment, wherein the image acquisition and processing system comprises an acquisition unit and an image processing unit; the CCD camera, the acquisition unit, the image processing unit and the data display equipment are successively connected via a data line. the laser, the laser resonant cavity and the CCD camera of the assistant resetting equipment are successively arranged along light paths. When in adjusting the cavity, guidance light emitted from the laser enters the laser resonant cavity after being attenuated by an attenuator; a light beam output after multiple round-trip is injected onto the photosurface of the CCD camera after contraction so as to form interference fringe image information; the image information is collected and processed by the image acquisition and processing system to obtain symmetry data; and finally, according to the obtained symmetry data, an endoscope in the laser resonant cavity is adjusted.

Description

technical field [0001] The invention relates to a matching component and a use method of an optical resonant cavity, in particular to an optical resonant cavity tuning system and a tuning method thereof. Background technique [0002] The laser resonator is the key device to realize laser energy extraction and output in the laser. Whether the laser resonator is collimated or not will directly affect the output beam quality and output power stability of the laser, so the laser must be installed or operated. The installation and adjustment of the resonant cavity mirror can only achieve the predetermined output index if the position of the cavity mirror meets the design requirements. [0003] Laser resonators are divided into two categories: unstable cavity and stable cavity. The output beam wavefront of the laser using the unstable cavity is spherical wave or plane wave, which is generally used for high-energy lasers; the output of the laser using the stable cavity is Gaussian ...

AI Technical Summary

Problems solved by technology

However, in the actual tuning process, due to the subjectivity of human eye observation, the symmetry of the interference fringes cannot be quantitatively judged. Therefore, different operators have subjective uncertainty in judging whether the interference fringes are symmetrical, which will lead to The accuracy and repeatability of the

In addition, environmental vibration and air disturbance will cause image blurring and throughput in the interference fringe image, which further reduces the accuracy and repeatability of human observation and judgment.

[0005] Chinese patent document No. CN100555772C discloses a cavity adjustment method based on an autocollimation feedback optical path, which can realize high-precision adjustment of confocal unstable cavity, but this method requires the use of an aberration detection system, the aberration detection The system is relatively expensive, and this method is only suitable for the adjustment of unstable chambers, which has certain limitations

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