材料科学
光纤布拉格光栅
光学
光纤激光器
拉曼光谱
拉曼散射
色散位移光纤
长周期光纤光栅
光电子学
激光器
磷
光纤
波长
光纤传感器
物理
作者
Xiaofan Zhao,Xin Tian,Qihao Hu,Binyu Rao,Meng Wang,Zefeng Wang
标识
DOI:10.1088/1612-202x/abe46f
摘要
Abstract We propose the design of a high-power fiber oscillator with chirped and tilted fiber Bragg gratings (CTFBGs) to suppress the stimulated Raman scattering within the fiber cavity and in the delivery fibers. A high-power single-mode fiber oscillator system was constructed for demonstration. With a CTFBG inserted into the fiber cavity, obvious Raman suppression was observed and the output signal laser power increased by ∼7%. With a CTFBG inserted between the oscillator and the delivery fibers, a maximum Raman suppression ratio of >20 dB was achieved, which implies a longer delivery distance for the same laser power level. By further improving the performance of CTFBGs, including lower inversion loss at signal wavelength, wider rejection bandwidth and deeper rejection depth, meanwhile optimizing the positions of CTFBGs, better Raman suppression could be obtained, which is significant for the further power scaling and delivery distance increasing of high-power fiber oscillators.
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