An active method for coupling laser with a high-finesse Fabry-Perot cavity in ultra-stable lasers

被引:4
|
作者
Meng, Fanchao [1 ,2 ]
Li, Zhichao [1 ,3 ]
Li, Jiaqing [1 ,3 ]
Meng, Lingqiang [1 ,4 ]
Yin, Xiongfei [1 ]
Bian, Wei [1 ]
Jia, Jianjun [1 ,2 ,4 ,5 ]
Wang, Jianyu [1 ,2 ,4 ]
机构
[1] Univ Chinese Acad Sci, Taiji Lab Gravitat Wave Universe, Key Lab Gravitat Wave Precis Measurement Zhejiang, Hangzhou Inst Adv Study,Sch Phys & Photoelect Engn, Hangzhou 310024, Peoples R China
[2] Chinese Acad Sci, Key Lab Space Act Optoelect Technol, Shanghai Inst Tech Phys, Shanghai 200083, Peoples R China
[3] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China
[4] Zhejiang Lab, Res Ctr Intelligent Sensing Syst, Hangzhou 311121, Peoples R China
[5] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
来源
OPTICS AND LASER TECHNOLOGY | 2024年 / 171卷
基金
中国国家自然科学基金; 国家重点研发计划;
关键词
Ultra-stable lasers; Fabry-Perot cavity; Active method; Misalignment; Recoupling; INSTABILITY; SYSTEM;
D O I
10.1016/j.optlastec.2023.110371
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
An active method for coupling a laser with a high-finesse Fabry-Pe ' rot cavity in ultra-stable lasers is proposed. This method uses the centroid of the reflected laser spot and the power ratio of the resonant modes to detect the misalignment between the laser and the Fabry-Pe' ;rot cavity. Subsequently, four actively rotating wedge prisms are used to compensate for the misalignment. Based on ray tracing and table lookup, the detection and compensation systems can form a closed loop for actively recoupling the laser into the Fabry-Pe' rot cavity when a misalignment occurs. Through experiments, the laser can be re-coupled with the Fabry-Pe' rot cavity by four 0.1 wedge prisms within a 0.9 mm decentration or a 0.1 tilt. The re-alignment of the laser and Fabry-Pe' ;rot cavity by active optical coupling may provide an alternative solution for the issue of support and vibration sensitivity of the Fabry-Pe' rot cavity. This solution is essential to improve the frequency stability of transportable and spaceborne ultra-stable lasers.
引用
收藏
页数:10
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