光子学报, 2016, 45 (3): 0314008, 网络出版: 2016-04-01
2 μm波段双波长间隔可调谐光纤激光器
2 μm Dual-wavelength Tunable Spacing All Fiber Thulium-doped Fiber Laser
激光 光纤激光器 双波长 多模干涉 间隔可调 掺铥光纤 Laser Fiber laser Dual-wavelength Multimode interference Tunable spacing thulium-doped fiber
摘要
提出并实验研究了一种2 μm波段全光纤间隔可调双波长光纤激光器.该激光器采用传统的环形腔设计,以最大输出功率33 dBm的1 565 nm光纤激光器为泵浦源,4 m单模掺铥光纤为增益介质,腔内为嵌入多模干涉滤波器的Sagnac环的复合滤波结构.该复合滤波器可实现间隔可调谐,高边模抑制比的双波长激光信号输出.通过泵浦功率的控制和对复合滤波器中偏振控制器的调节,实现双波长3 nm到80 nm间隔可调的激光输出,边模抑制比为60 dB,线宽为0.2 nm,功率稳定度为±1.5 dB/h,双峰能量差小于4 dB.
Abstract
A dual-wavelength tunable spacing all fiber thulium-doped laser is reported and demonstrated.The conventional ring cavity is used in this fiber laser, 1 565 nm pump source can achieve maximum output power 33 dBm, and a segment of 4m long single mode thulium-doped fiber is gain medium.The filter is a composite structure based on multimode interference effect and Sagnac ring. Through the composite filter, it can radiate tunable spacing and high side mode suppression ratiodual- wavelength laser output. The experimental results suggest that not only dual-wavelength tunable spacing from 3 nm to 80 nm, but also SMSR is 60 dB under the controlling of pump power and polarization controller in composite filter,line-width is 0.2 nm ,power fluctuation is ±1.5 dB/h,bimodal energy difference is less than 4 dBm.
张岩, 王天枢, 张鹏, 马万卓, 刘鹏, 苏煜炜, 毕明喆, 张靓. 2 μm波段双波长间隔可调谐光纤激光器[J]. 光子学报, 2016, 45(3): 0314008. ZHANG Yan, WANG Tian-shu, ZHANG Peng, MA Wan-zhuo, LIU Peng, SU Yu-wei, BI Ming-zhe, ZHANG Jing. 2 μm Dual-wavelength Tunable Spacing All Fiber Thulium-doped Fiber Laser[J]. ACTA PHOTONICA SINICA, 2016, 45(3): 0314008.