Influence of Test Mirror′s Misalignment on High Reflectivity Measurement with Cavity Ring-down Technique

Zhe-chao, 曲哲超 Qu; Bincheng, 李斌成 Li; Yanling, 韩艳玲 Han

doi:10.3788/gzxb20114009.1366

Cited by 5 publications

(1 citation statement)

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“…In the CRD high reflectivity measurement, the precision of the cavity adjustment has a significant effect on the measurement result [1][2][3] . The process of CRD high reflectivity measurement is usually divided into three steps [4] .…”

Section: Introductionmentioning

confidence: 99%

Ring-down cavity adjustment based on the circumscribed ellipse criterion of the cavity transmission spot

Tian

Lin

et al. 2023

AOPC 2022: Advanced Laser Technology and Applications

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In the application of cavity ring-down (CRD) high reflectivity measurement, precise adjustment of ring-down cavity (RDC) is of great importance. The transmission spot shape monitoring, which contains the judgment of the mode order and nodal direction of intracavity transverse mode, is an important method for cavity adjustment. In this paper, several criterions of circumscribed spot shape are compared. After spot binarization, the circumscribed circle, circumscribed rectangle, and circumscribed ellipse of transmission spot is analyzed, respectively. The theoretical comparison shows that the circumscribed ellipse criterion can effectively distinguish the mode order and nodal direction simultaneously. The spot can be recognized as the fundamental transverse mode when the area ratio of the spot to its circumscribed ellipse is in the range of 0.9 to 1.0. This method is tested by an experimental setup. It is found to be an efficient cavity adjustment method for the CRD technique.

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Section: Introductionmentioning

confidence: 99%