Low-threshold high-efficiency all-fiber laser generating cylindrical vector beams operated in LP11 mode throughout the entire cavity

We demonstrate an all-fiber cylindrical vector beam (CVB) laser that operates in the high-order mode throughout the entire cavity based on the polarization dependence of few-mode fiber Bragg gratings. To the best of our knowledge, it is the first time that an annular doping Yb-doped fiber (AYDF) is...

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Published inApplied physics express Vol. 11; no. 12
Main Authors Li, Hongxun, Yan, Ke, Zhang, Yimin, Gu, Chun, Yao, Peijun, Xu, Lixin, Zhang, Rui, Su, Jingqin, Chen, Wei, Zhu, Yonggang, Zhan, Qiwen
Format Journal Article
LanguageEnglish
Published The Japan Society of Applied Physics 01.12.2018
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Summary:We demonstrate an all-fiber cylindrical vector beam (CVB) laser that operates in the high-order mode throughout the entire cavity based on the polarization dependence of few-mode fiber Bragg gratings. To the best of our knowledge, it is the first time that an annular doping Yb-doped fiber (AYDF) is employed to reduce the laser threshold and enhance the slope efficiency for the LP11 mode. The resonance efficiency of this all-fiber laser reaches 53.3% with a low threshold of 32.9 mW. Moreover, radially and azimuthally polarized beams can be generated and switched by adjusting the polarization controllers within the fiber laser.
ISSN:1882-0778
1882-0786
DOI:10.7567/APEX.11.122502