基于可饱和吸收体和3dB环镜滤波器结构的双波长激光器  

Dual-wavelength laser based on saturable absorber and 3 dB ring mirror filter structure

作　　者：张威 果鑫 赖榕 韩林桀 夏志鸿 ZHANG Wei;GUO Xin;LAI Rong;HAN Linjie;XIA Zhihong(Department of Communication Engineering,School of Computer Science,Hunan University of Technology,Zhuzhou 412007,China)

机构地区：[1]湖南工业大学计算机学院通信工程系,株洲412007

出　　处：《激光技术》2025年第1期1-7,共7页Laser Technology

基　　金：湖南省教育厅科学研究重点项目(23A0446);湖南省自然科学基金(省市联合)资助项目(2022JJ50067);湖南工业大学2023年大学生创新创业训练计划项目。

摘　　要：为了提高双波长环形腔激光器的激光输出质量,将掺铒光纤可饱和吸收体加入3 dB环镜,构成滤波环,采用滤波环与输出端耦合器级联实现激光器输出滤波,并进行了理论分析和实验验证。结果表明,波长为1554 nm和1562 nm的激光输出带宽分别为0.029 nm和0.038 nm,双波长峰值波动分别为0.0048 mW和0.0087 mW,信噪比为55 dB。此基于可饱和吸收体和3 dB环镜滤波器结构的双波长激光器具有更好的线宽压窄特性和稳定性,可应用于大容量通信和激光治疗等领域。In order to improve the laser output quality of a dual-wavelength annular cavity laser,a saturable absorber of erbium-doped fiber was added to the 3 dB ring mirror to form a filter ring,and the filter ring and the output coupler were cascaded to realize the laser output filtering.Theoretical analysis and experimental verification were carried out.The results show that the laser output bandwidth of 1554 nm and 1562 nm wavelengths are 0.029 nm and 0.038 nm,the peak fluctuations of dual wavelengths are 0.0048 mW and 0.0087 mW,and the signal-to-noise ratio is 55 dB,respectively.The results show that the dual-wavelength laser based on the saturable absorber and 3 dB ring mirror filter structure has better linewidth narrowing characteristics and stability.It can be used in the field of high capacity communication and laser therapy.

关 键 词：激光器 环形腔 双波长 可饱和吸收体 窄线宽 

分 类 号：TN242[电子电信—物理电子学]