基于光纤Bragg光栅F-P滤波器及复合双环腔滤波器的单纵模掺铥光纤激光器  

Single-longitudinal Mode Thulium-doped Fiber Laser Based on Fabry-Pérot Fiber Bragg Grating Filter and Passive Compound Double-rings Cavity

作　　者：韩文国 延凤平[1] 冯亭 程丹 李挺[1] 白卓娅 秦齐 杨丹丹 张鲁娜 郭颖[1] 王伟[1] 关彪[1] 张璇 HAN Wen-guo;YAN Feng-ping;FENG Ting;CHENG Dan;LI Ting;BAI Zhuo-ya;QIN Qi;YANG Dan-dan;ZHANG Lu-na;GUO Ying;WANG Wei;GUAN Biao;ZHANG Xuan(Key Laboratory of All Optical Network and Advanced Telecommunication Network, Ministry of Education, Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China;Photonics Information Innovation Center, College of Physics Science & Technology, Hebei University, Baoding 071002, China;Key Laboratory of Solid Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China)

机构地区：[1]北京交通大学全光网络与现代通信网教育部重点实验室,光波技术研究所,北京100044 [2]河北大学物理科学与技术学院光信息技术创新中心,河北保定071002 [3]中国科学院理化技术研究所固体激光重点实验室,北京100190

出　　处：《发光学报》2021年第9期1419-1426,共8页Chinese Journal of Luminescence

基　　金：国家自然科学基金(61827818,61620106014,61775128)资助项目。

摘　　要：提出了一种基于光纤Bragg光栅Fabry-Pérot(F-P)窄带滤波器和复合双环腔滤波器的单纵模掺铥光纤激光器。通过对复合双环腔进行数值仿真并实验制作,结合光纤Bragg光栅F-P滤波器的窄带滤波特性,实现了光纤激光器的单纵模选取。激光器输出波长为1941.56 nm,光信噪比为55.8 dB,70 min内的波长和功率波动分别小于0.019 nm和1.464 dB。由自制的基于非平衡迈克尔逊干涉仪线宽测试系统测量了所提出的掺铥光纤激光器输出单纵模激光的频率噪声特性,并用β线方法由频率噪声谱估计了不同测量时间下的激光线宽,2 ms测量时间下的典型激光线宽值为14.194 kHz。A single-longitudinal-mode(SLM)thulium-doped fiber laser based on an F-P narrowband filter and compound rings cavity is proposed.The compound rings incorporated in the cavity can help to achieve SLM lasing by adjusting the cavity FSR and it also plays the role of narrowband filtering.A theoretical model which can numerically calculate the transmission spectrum of the complex multi-ring sub-cavity filter is proposed.The output wavelength of the laser source is 1941.56 nm,and the optical signal-to-noise ratio is 55.8 dB.The wavelength and power fluctuations within 70 min were less than 0.019 nm and 1.464 dB,respectively.Experimental results also show that the laser operates in a stable SLM state.The frequency noise characteristic of the proposed SLM laser was measured by a homemade unbalanced Michelson interferometer,and laser linewidth under different measurement time was estimated from the frequency noise spectra based on theβ-separation line method.The calculated laser linewidth in 2 ms measurement time is 14.194 kHz.

关 键 词：光纤激光器 掺铥光纤 单纵模 光纤光栅 

分 类 号：O436[机械工程—光学工程] TN248.4[理学—光学]