Low-energy distortion-free femtosecond pulse laser inscription in coated, free-standing optical fiber

8th International Conference on Advanced Infocomm Technology

Chen, Yijing^1 ; Lai, Yicheng^1 ; Cheong, Marcus W.O.^1

Data Storage Institute (DSI), Agency for Science, Technology and Research (A STAR), 5 Engineering Drive 1, Singapore

117608, Singapore^1

关键词: Beam-shaping;    Distortion-free;    Femtosecond pulse laser;    First order;    Low-energy;    Optimal focusing;    Pulse energies;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/679/1/012056/pdf
DOI  :  10.1088/1742-6596/679/1/012056

来源: IOP

【 摘 要 】

Low-energy, distortion-free femtosecond pulse laser inscription in coated freestanding fiber is demonstrated for the first time. Methodology features radial plane beamshaping to achieve optimal focusing and spot-like inscription within the fiber. Strong, first- order fiber Bragg grating is achieved in coated single-mode fiber using only 50nJ pulse energy.