Simultaneous tailoring of longitudinal and transverse mode inside an Er:YAG laser  

作　　者：Rui Song Xueting Liu Shiyao Fu Chunqing Gao 宋睿;刘雪婷;付时尧;高春清(School of Optics and Photonics,Beijing Institute of Technology,Beijing 100081,China;Key Laboratory of Photoelectronic Imaging Technology and System,Ministry of Education,Beijing 100081,China;Key Laboratory of Information Photonics Technology,Ministry of Industry and Information Technology,Beijing 100081,China)

机构地区：[1]School of Optics and Photonics,Beijing Institute of Technology,Beijing 100081,China [2]Key Laboratory of Photoelectronic Imaging Technology and System,Ministry of Education,Beijing 100081,China [3]Key Laboratory of Information Photonics Technology,Ministry of Industry and Information Technology,Beijing 100081,China

出　　处：《Chinese Optics Letters》2021年第11期60-65,共6页中国光学快报（英文版）

基　　金：This work was supported by the National Key Research and Development Program of China(No.2017YFB0405203);National Natural Science Foundation of China(Nos.11834001 and 61905012);National Defense Basic Scientific Research Program of China(No.JCKY2020602C007)。

摘　　要：In this paper, we demonstrate a scheme to tailor both longitudinal and transverse modes inside a laser cavity and constitute an eye-safe single longitudinal mode Er∶Y_(3)Al_(5)O_(12)(Er:YAG) vector laser. A q-plate is employed as a spin-orbital conversion element to modulate the transverse mode and obtain cylindrical vector beams. An optical isolator is employed as a nonreciprocal element for the ring cavity to enforce unidirectional operation and achieve single longitudinal oscillation. The characteristics of power, transverse intensity, and polarization spectrum of the output beams are observed. The observed typical single longitudinal mode and highly matched special polarizations prove the successful tailoring of both longitudinal and transverse modes.

关 键 词：ER:YAG single longitudinal mode cylindrical vector beam 

分 类 号：TN248[电子电信—物理电子学]