45°倾斜光纤光栅波长可调谐调Q光纤激光器  

Wavelength-tunable Q-switched fiber laser based on a 45° tilted fiber grating

作　　者：胡啸林 闫志君 黄千千 邹传杭 王天行 牟成博 Hu Xiaolin;Yan Zhijun;Huang Qianqian;Zou Chuanhang;Wang Tianxing;Mou Chengbo(Key Laboratory of Specialty Fiber Optics and Optical Access Networks,Shanghai Institute for Advanced Communication and Data Science,Joint Laboratory of International Cooperation for Specialty Optical Fiber and Advanced Communication, Shanghai University,Shanghai 200444,China;The School of Optical and Electronic Information,National Engineering Laboratory for Next Generation Internet Access System,Huazhong University of Science and Technology,Wuhan,Hubei 430074,China)

机构地区：[1]上海大学特种光纤与光接入网重点实验室,上海先进通信与数据科学研究院,上海大学特种光纤与先进通信国际合作联合实验室,上海200444 [2]华中科技大学光学与电子信息学院下一代互联网接入系统国家工程实验室,湖北武汉430074

出　　处：《光电工程》2018年第10期170666-170672,共7页Opto-Electronic Engineering

基　　金：国家自然科学基金青年项目基金资助项目(61605107,61505244)；上海市青年东方学者项目(QD2015027)；国家青年千人项目

摘　　要：本文提出了一种基于45°倾斜光纤光栅与带通滤波器的连续可调谐全光纤调Q掺铒激光器,45°倾斜光纤光栅与其两侧的偏振控制器可以实现非线性偏振旋转效应,调Q的产生则是因为非线性偏振旋转效应使环形腔中的激光产生强度依赖损耗从而导致脉冲压缩。在泵浦功率为655 mW时,通过调节具有中心波长选择作用的带通滤波器,调Q状态下可以实现光谱在1512 nm～1552 nm范围内的连续可调,平均输出功率从0.282 mW逐渐增加到4.884 mW,脉冲重复频率从23.7 kHz逐渐增加到119.0 kHz。据我们所知,这是目前为止基于非线性偏振旋转效应与光谱带通滤波器实现的可调谐调Q的光纤激光器中连续可调谐波长范围最宽的。A continuously tunable Q-switched all-fiber Er-doped laser based on a 45°tilted fiber grating and tunable bandpass filter is demonstrated.The 45°tilted fiber grating is used to achieve the nonlinear polarization rotation(NPR)along with two polarization controllers(PCs),Q-switching is realized due to the fact that the NPR effect in-duced intensity-dependent loss.Under the pump power of 655 mW,the Q-switched optical spectrum can be continuously tuned from 1512 nm to 1552 nm by simply rotating the tunable bandpass filter.During the wavelength tuning process,the average output power increases from 0.282 mW to 4.884 mW while the repetition rate enhances from 27.3 kHz to 119 kHz.To the best of our knowledge,this is the widest continuously tunable range of Q-switched fiber Lasers based on nonlinear polarization rotation effect and spectral bandpass filter.

关 键 词：光纤激光器 调Q激光器 光纤光栅 可调谐激光器 

分 类 号：O436.3[机械工程—光学工程] TN253[理学—光学]