基于多模光纤滤波器的可调谐掺铒光纤激光器  

Tunable Erbium-Doped Fiber Laser Based on Multi-Mode Fiber Filter

作　　者：郝艳萍[1] 张书敏[1] 王新占[1] 孟义昌[1] 李辉辉[1] 杜娟[1] 李红飞[1] 

机构地区：[1]河北师范大学物理科学与信息工程学院河北省薄膜材料实验室,河北石家庄050016

出　　处：《光学学报》2011年第8期205-210,共6页Acta Optica Sinica

基　　金：国家自然科学基金(11074065);河北省自然科学基金(F2009000321);高等学校博士学科点专项科研基金(20101303110003)资助课题

摘　　要：研究了一种新型、全光纤、宽带可调谐环形腔掺铒光纤激光器。该激光器利用由单模-多模-单模光纤组成的滤波器实现波长可调谐及激光器的全光纤结构。该滤波器将多模光纤缠绕在偏振控制器上,两端分别与一段单模光纤相连,通过调整偏振控制器的状态,实现了中心波长1542～1560nm的不同激光输出。单波长连续可调谐激光器的波长可调范围为18nm,边模抑制比大于40dB,3dB线宽为0.096nm;进一步调整偏振控制器的状态和抽运功率,实验同时得到了连续可调谐的双波长、三波长等多波长激光输出。对于可调谐的多波长激光器,通过调整偏振控制器的状态,可实现波长间隔及输出中心波长两者可调。A new-style, all-fiber, broad-band tunable erbium-doped fiber ring laser is proposed. The wavelength continuous tuning is realized by using a single-mode/multimode/single-mode fiber as a filter, in which the multimode fiber is wrapped around a polarization controller, and is spliced to a single-mode fiber at each ends. By carefully adjusting the polarization controllers in the cavity, the output central wavelength of tunable single-wavelength laser is tunable from 1542 to 1560 nm over a range of 18 nm, with a signal-to-noise ratio of 40 dB and the 3-dB linewidth of 0.096 nm. Furthermore, by appropriately rotating the polarization controllers and changing the pump power, wavelength continuously tunable dual- and triple-wavelength laser output is also experimentally demonstrated, and the wavelength selection and switching can be achieved by adjusting the polarization controllers in the cavity.

关 键 词：激光器 可调谐光纤激光器 多模光纤滤波器 全光纤 

分 类 号：TN248.1[电子电信—物理电子学]