光学精密工程2023，Vol.31Issue(23)：3395-3404,10.DOI:10.37188/OPE.20233123.3395
基于对称双模耦合器的波长可切换柱矢量光纤激光器
Wavelength-switchable cylindrical vector fiber laser based on symmetrical two-mode coupler
摘要
Abstract
To obtain high-purity cylindrical vector beam pulses,a wavelength-switchable passive mode-locked cylindrical vector beams all-fiber laser is proposed and constructed based on a symmetrical two-mode coupler.First,the refractive index matching diameter for the conversion from the fundamental mode to the higher-order mode was obtained based on the principles of fiber optic transmission.The influence ex-erted by the structural parameters of the symmetrical two-mode coupler on mode selection and coupling characteristics was analyzed,employing simulations of mode coupling theory and the beam propagation method.The symmetrical double-mode coupler was fabricated utilizing the fusion tapering method.This method eliminates the complicated pre-taper process commonly employed in traditional mode selection cou-pler production.Finally,a passive mode-locked all-fiber laser,based on the symmetrical two-mode cou-pler,was constructed.This laser showcases a switchable central wavelength of 1 039 nm and 1 068 nm,pulse repetition interval of 113.8 ns,repetition rate of 8.78 MHz,pulse durations of 660 ps/656 ps,and maximum output average power of 5.25 mW/5.2 mW.In addition,it achieves a mode purity of over 97%for the vector beam output.The conducted experiments validate the feasibility of the symmetrical two-mode coupler and present a viable solution for obtaining high-purity cylindrical vector beams in future applications.关键词
光纤激光器/对称双模耦合器/非线性偏振旋转锁模/柱矢量光/高纯度Key words
fiber laser/symmetric two-mode coupler/nonlinear polarization rotation principle mode-locked/cylindrical vector beams/high mode purity分类
电子信息工程引用本文复制引用
裴思琪,张天宇,张昆,杨博义,朱云,胡佳鹏,刘学胜,刘友强,王智勇..基于对称双模耦合器的波长可切换柱矢量光纤激光器[J].光学精密工程,2023,31(23):3395-3404,10.基金项目
北京市自然科学基金资助项目(No.1212009) （No.1212009）
基础科研项目(No.JCKY2021110B175) （No.JCKY2021110B175）
快速支持计划资助项目(No.80914020105) （No.80914020105）
固体激光技术重点实验室开放基金资助项目 （）
