摘要
本文提出了一种基于光纤双锥滤波结构的掺铥光纤激光器(thulium-doped fiber laser,TDFL)。首先,通过对单模光纤进行拉锥处理并级联为双锥结构,制备了光纤马赫-曾德尔干涉(Mach-Zehnder interferometer,MZI)滤波器;随后,设计并搭建了泵浦波长为793 nm,增益介质长度为3.5 m的TDFL,激光器阈值为126 mW。实验中,通过调节偏振控制器(polarization controller,PC),实现了1830.6—1881.7 nm范围内的单波长激光可切换输出,最小波长间隔为7.1 nm;在1841.7—1881.1 nm范围内实现了双波长激光可切换输出,最小及最大波长间隔分别为4.5nm和35.7nm。在20 min的监测时间内,激光器能够稳定输出单波长和双波长激光,功率波动分别小于0.52 dB和0.91 dB。本文提出的TDFL具有波长切换灵活的特点,在激光传感和测试等方面具有重要的应用价值。
A wavelength-switchable thulium-doped fiber laser(TDFL)based on a double fiber-tapered filter was proposed.Firstly,a Mach-Zehnder interferometer(MZI)filter was fabricated by cascading two fiber tapers produced by tapering single-mode fiber.Subsequently,a TDFL with a pump wavelength of 793 nm and a gain medium length of 3.5 m was designed and constructed,exhibiting a laser threshold of 126 mW.In the experiment,by adjusting the polarization controller(PC),a single-wavelength laser switching output within the range of 1830.6—1881.7 nm was achieved,with a minimum wavelength interval of 7.1 nm.Additionally,a dual-wavelength switchable laser output within the range of 1841.7—1881.1 nm was realized,with minimum and maximum wavelength intervals of 4.5 nm and 35.7 nm,respectively.During the 20 min monitoring period,the laser demonstrated stable single-and dual-wavelength outputs,with power fluctuations of less than 0.52 dB and 0.91 dB,respectively.The proposed TDFL exhibits flexible wavelength switching characteristics and holds significant application potential in laser sensing and measurement fields.
作者
王汉斌
董政洁
WANG Hanbin;DONG Zhengjie(School of Intelligent Mechanical and Electrical Engineering,Zhongyuan University of Technology,Zhengzhou,Henan 450007,China;Center of Product Quality Inspection and Testing of Luoyang,Luoyang,Henan 471000,China)
出处
《光电子.激光》
北大核心
2025年第6期582-587,共6页
Journal of Optoelectronics·Laser
基金
河南省科技攻关项目(222102210254)资助项目。
