光纤布拉格光栅
光学
材料科学
激光线宽
光纤激光器
激光器
分布布拉格反射激光器
分布式布拉格反射镜
物理
作者
Jian-Cheng Deng,Yanxin Li,Ming Shen,Xuewen Shu
标识
DOI:10.1109/jlt.2022.3160490
摘要
We propose and demonstrate a novelsingle-frequency erbium-doped random distributed Bragg reflector fiber laser (RDBR-FL) constructed by a random fiber grating (RFG) and a high-reflection fiber Bragg grating (HR-FBG). Since it is not necessary to precisely control the axial position of the sub-gratings constituting the RFG, the inscription of long RFGs is easy and low-cost. The RFG manufactured by femtosecond laser point-by-point inscription technique has a length of up to 76 mm. The reflection spectrum of the RFG is designed to ensure the stable single-peak emission of the RDBR-FL under the HR-FBG spectral filtering. The bandwidth of the selected reflection peak of the RFG is only 13 pm, which ensures the single frequency operation of the RDBR-FL. The measured linewidth of the RDBR-FL is 3.9 kHz. Experimental measurement shows that the effective cavity length of the RDBR-FL is as long as 109 mm, which is consistent with the theoretical calculation.
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