基于微光纤Sagnac环的可切换多波长掺铒光纤激光器  

Switchable Multi-wavelength Erbium-doped Fiber Laser Based on a Microfiber Sagnac Loop

作　　者：季彦呈[1] 陈育培 刘文 孙丹 李帅 章国安[1] 朱晓军[1,2] JI Yancheng;CHEN Yupei;LIU Wen;SUN dan;LI Shuai;ZHANG Guoan;ZHU Xiaojun(School of Information Science and Technology,Nantong University,Nantong,Jiangsu 226019,China;Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province&Key Lab of Modern Optical Technologies of Education Ministry of China,Soochow University,Suzhou,Jiangsu 215006,China)

机构地区：[1]南通大学信息科学技术学院,江苏南通226019 [2]苏州大学江苏省先进光学制造技术重点实验室、教育部现代光学技术重点实验室,江苏苏州215006

出　　处：《光子学报》2021年第5期76-85,共10页Acta Photonica Sinica

基　　金：国家自然科学基金(No.61971245);苏州大学江苏省先进光学制造技术重点实验室,教育部现代光学技术重点实验室开放课题(Nos.KJS1858,KJS1204);江苏省“六大人才高峰”(No.KTHY-052);江苏省大学生创新创业训练计划(No.202010304055Z);南通市科技计划(No.JC2020139)。

摘　　要：提出了一种基于微光纤Sagnac环的可切换多波长掺铒光纤激光器。微光纤Sagnac环梳状滤波器是由一个腰区直径为5.68μm的微光纤耦合器熔接一段5.5 cm的保偏光纤而成。将该滤波器熔接到光纤环形腔中,通过调节偏振控制器,实现了四波长激光输出。此外还分别实现了稳定可切换的单、双、三波长激光输出,且双波长和三波长激光的输出间隔可调谐。实验结果表明,所有输出激光光谱的3 dB线宽均小于0.027 nm,边模抑制比均大于40 dB,最大可达到58 dB。对输出三波长的激光进行稳定性测试,其在1 h内波长偏移量小于0.028 nm,峰值功率波动量小于0.9 dB。该激光器单色性好、稳定性好,可应用于波分复用及全光通信系统等领域。A switchable multi-wavelength erbium-doped fiber laser based on a microfiber Sagnac loop is proposed and experimentally demonstrated.The microfiber Sagnac loop comb filter is fabricated by inserting a 5.5 cm polarization maintaining fiber between two outputs of an optical microfiber coupler with a waist diameter of 5.68μm.The filter is fused into the fiber ring cavity and the four-wavelength output laser is realized by adjusting the polarization controller.In addition,the output of single-,dual-,triplewavelength laser can be switched,and the outputs interval of dual-,triple-wavelength are tunable.The experimental results show that the 3 dB linewidths of laser output spectra are less than 0.027 nm and the side-mode suppression ratio are more than 40 dB,up to 58 dB.When the fiber laser operates at triplewavelength,the wavelength shift and peak power fluctuation are within 0.028 nm and 0.9 dB in one hour.The laser has stable output and good monochromaticity,which can be applied in fields of wavelength division multiplexing and all-optical communication systems.

关 键 词：微光纤 SAGNAC环 多波长 可切换 保偏光纤 光纤激光器 

分 类 号：TN248[电子电信—物理电子学]