Wang, Chongwei; Li, Hongye; Wu, Baiyi; Zhao, Xiaofan; … - 2022
Beneficial from the development of femtosecond laser direct writing technique, the fabrication of Bragg gratings inside a fiber with low photosensitivity like active fiber becomes possible. In this paper, we fabricate erbium-doped fiber Bragg gratings (EDFBGs) using femtosecond laser...