采用Mach-Zehnder结构输出连续可调的掺铒光纤激光器

发布时间：2018-04-12 14:09

本文选题：可调谐光纤激光器 + M-Z滤波结构　；参考：《激光杂志》2017年02期

【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。
[Abstract]:In order to realize the tunable and high stability operation of the laser, based on the erbium-doped fiber laser with Mach-Zehndern M-Z filter structure, the transmission spectral interval length of the M-Z filter is changed by using the electro-optic delay line optical Delay line ODL.Thus the tunable output of the laser is realized.In this paper, the working principle and design scheme of the laser are theoretically analyzed. In the experiment, the Erbium-doped fiber with length of 8 m is used as the gain medium of the laser and the fiber subcavity structure is used to improve the stability of the laser. The operating wavelength is excited by the 976nm pump source.The room temperature threshold power of the laser is 54 MW, and when the pump power is 60 MW, the wavelength of the laser can be adjusted flexibly in the range of 1558nm to 1568nm by adjusting the polarization controller (polarization controller).Moreover, seven edge-mode rejection ratios are all larger than 40dB, and the line widths are less than 0.1 nm.There is no obvious mode hopping within 30 minutes, the wavelength drift range is less than 0.1 nm, and the power fluctuation is less than 2 dB.
【作者单位】：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;北京信息科技大学生物医学检测技术及仪器北京实验室;
【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)
【分类号】：TN248

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