采用Mach-Zehnder结构输出连续可调的掺铒光纤激光器  

A wavelength switchable erbium doped fiber laser based on Mach-Zehnder filter structure

作　　者：丁香栋 何巍[1] 姚齐峰[1] 骆飞[1] 祝连庆[1,2] 

机构地区：[1]北京信息科技大学光电信息与仪器北京市工程研究中心,光电测试技术北京市重点实验室,北京100016 [2]北京信息科技大学生物医学检测技术及仪器北京实验室,北京100192

出　　处：《激光杂志》2017年第2期24-28,共5页Laser Journal

基　　金：长江学者和创新团队发展计划(IRT1212);北京市重大科技计划项目(PXM2013-014224-000077,PXM2012-014224-000019);光电信息与仪器北京市工程研究中心开放课题(GD20150005)

摘　　要：为了实现激光可调谐和高稳定性运行,在Mach-Zehnder(M-Z)滤波结构的掺铒光纤激光器的基础上,通过采用电动光学延迟线(Optical Delay Line,ODL)来改变M-Z滤波器的透射光谱间隔长度,从而实现了激光器的可调谐输出。对激光器的工作原理和设计方案进行了理论分析,实验上采用长度8m的掺铒光纤作为激光增益介质和用于提高激光器稳定性的光纤子腔结构,在工作波长为976nm泵浦源的激励下,得到激光器的室温阈值功率为54m W;当泵浦功率为60m W时,通过调节偏振控制器(Polarization Controller,PC),实现了在1558nm至1568nm范围内波长灵活可调,并且获得了7个边模抑制比均大于40d B单波长激光的可切换输出,线宽均小于0.1nm。在30分钟内没有出现明显跳模现象,波长漂移范围小于0.1nm,功率波动低于2d B。In order to realize a highly stable and tunable laser output, an Er^3＋-doped fiber laser based on Mach- Zehnder filter structure is proposed, the theoretical analysis and experiment verification are presented. In the designed configuration, an optical delay line（ODL） is used to change the M-Z filter wavelength interval, For designed fiber la- ser, one 976nm laser diode （LD） is used for pumping source, 8m-long Er^3＋-doped fiber （EDF） is selected as the gain medium; the threshold of the fiber laser is 54mW, and a sub cavity structure is designed and adopted to improve the laser stability. In the experiment, by adjusting the PC, when the pump power is 60mW, stable and switchable sev- en single-wavelengths output laser is separately realized within 1558nm to 1568nm, All side-mode suppression ratios （SMSRs） are more than 40dB, and the 3dB line-width of the single longitudinal mode output is less than 0.1nm. In 30 minutes, there is no obvious mode hopping, and the shift of wavelength is less than 0. 1 nm, and the power fluctua- tion is less than 2dB.

关 键 词：可调谐光纤激光器 M-Z滤波结构 光学延迟线 掺铒光纤 

分 类 号：TN248.1[电子电信—物理电子学]