Chinese Optics Letters, 2025, 23 (7): 071404, Published Online: Jun. 17, 2025
Generation of cylindrical vector beams based on fiber Bragg gratings inscribed in ring core fibers
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Abstract
We propose a method for generating an all-fiber cylindrical vector beam (CVB) using a fiber Bragg grating (FBG) inscribed in a ring core fiber (RCF). The FBGs are inscribed using the femtosecond laser phase mask scanning technique, chosen for its large ring core diameter and low photosensitivity of the RCF. Additionally, a lateral offset splicing spot is introduced to couple the fundamental mode to the second-order modes. Switchable LP01 and LP11 mode lasers can be achieved. Meanwhile, azimuthally and radially polarized CVBs are successfully realized by adjusting the polarization controllers.
Yajun Jiang, Kangwei Pan, Feng Zhou, Liqin Cheng, Yuhui Su, Li Shen, Jiaxin Gao, Binchuan Sun, Dexing Yang, Jianlin Zhao. Generation of cylindrical vector beams based on fiber Bragg gratings inscribed in ring core fibers[J]. Chinese Optics Letters, 2025, 23(7): 071404.
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