双FBG双波长掺铒光纤激光器设计与实验研究  

Design and Experimental Study of Two-Wavelength Erbium-Doped Fiber Laser Using a Pair of Fiber Bragg Gratings

作　　者：刘芸[1] 邢俊红[1] 焦明星[1] 王佳翼[1] 

机构地区：[1]西安理工大学机械与精密仪器工程学院,陕西西安710048

出　　处：《西安理工大学学报》2012年第3期303-307,共5页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目(51175421;61205135);陕西省科技计划基金资助项目(2011K09-14);陕西省教育厅产业化培育项目(2010JC12);陕西省教育厅科学研究计划项目(2010JK726;2010JK696);校青年科学研究计划项目(102-211014;102-211113)

摘　　要：波长可调谐的双波长光纤激光器由于带宽较宽、线宽窄,与光纤元件天然兼容等特点,可作为DWDM光纤通信及光纤传感系统的理想光源。设计并实验研究了一种双波长环形腔掺铒光纤激光器,该激光器采用两根FBG和一个3dB耦合器构成可调谐Y型光滤波器,并通过对FBG施加轴向应力改变布拉格中心波长,从而获得波长可调谐的双波长激光输出。实验结果表明:当轴向负载在0～100 N范围内变化时,双波长光纤激光器的波长差在0.638～1.616 nm范围内线性调谐,调谐灵敏度为0.009 6 nm/N。利用增益均衡方法独立调节激光腔内的增益和损耗,光纤激光器可在单波长和双波长两种运转状态之间切换。The tunable two-wavelength fiber laser can be used as an ideal source for DWDM fiber communication and fiber sensor,because of its advantages such as wider bandwidth,narrower line-width and natural compatibility with fiber.A two-wavelength erbium-doped fiber ring laser has been designed and investigated experimentally,in which a tunable Y-type optical filter constructed with a pair of fiber Bragg gratings（FBGs） and a 3dB coupler have been used,and both FBGs are axially applied to different stresses to change both Bragg wavelengths so that a tunable two-wavelength laser output can be obtained.The experimentally obtained results have shown that the wavelength difference of the two-wavelength fiber laser is linearly tunable in a range from 0.638 nm to 1.616 nm when the axial load varies from zero to 100 N,corresponding to a tuning sensitivity of 0.009 6 nm/N approximately.The fiber laser can be switchable between one-and two-wavelength operations by adjusting the intra-cavity gains and losses via using the gain equalization method independently.

关 键 词：双波长掺铒光纤激光器 光纤Bragg光栅(FBG) 波长调谐 增益均衡 

分 类 号：TN248.1[电子电信—物理电子学]