红外与毫米波学报2025，Vol.44Issue(2)：161-167,7.DOI:10.11972/j.issn.1001-9014.2025.02.003
准连续2μm掺铥光纤激光器时频特性控制
Time and frequency domain characteristics control of a quasi-continuous 2μm thulium-doped fiber laser
摘要
Abstract
Lasers with wavelengths around 2 μm are located in the atmospheric transmission window and at the strong absorption peak of water,and have important applications in medicine,light detection and ranging(LIDAR),material processing,and pump sources for mid-infrared lasers.The thulium-doped fiber laser(TDFL)stands out as a critical light source capable of delivering high power outputs at this wavelength.In this paper,to address the problems of relax-ation oscillation and inter-modal four-wave mixing in a quasi-continuous wave(QCW)TDFL,the time and frequency-domain output characteristics of the laser are optimized by increasing the bias current,optimizing the length of the gain fiber,and changing the diameter of the fiber coiling,etc.The effects of different gain fiber structures on the fiber trans-mission modes are also investigated.The developed QCW-TDFL achieves a peak power of 894 W and an average power of 89.4 W at a central wavelength of 1 939.2 nm with a pulse width of 100 μs,a repetition frequency of 1 kHz and a du-ty cycle of 10％,and obtains stable and controllable pulse output waveform and spectral characteristics.关键词
准连续光纤激光器/2μm激光光源/掺铥光纤/弛豫振荡/模间四波混频Key words
quasi-continuous fiber laser/2 μm laser source/thulium-doped fiber/relaxation oscillation/inter-modal four-wave mixing分类
信息技术与安全科学引用本文复制引用
梅雪晗,陈翔,徐港,杨元忠,张仲,雷诚,李胜,王行环,王度..准连续2μm掺铥光纤激光器时频特性控制[J].红外与毫米波学报,2025,44(2):161-167,7.基金项目
湖北省重点研发计划(2023BCB001) （2023BCB001）
国家自然科学基金(62075200,12374295)Supported by the Key Research and Development Program of Hubei Province(2023BCB001),the National Natural Science Foun-dation of China(62075200,12374295) （62075200,12374295）
