高能量脉冲Tm:YAG激光器研究  

Study on high energy pulsed Tm:YAG laser

作　　者：张奥 姚育成[1] 朱晓峰 叶君竹 王子怡 ZHANG Ao;YAO Yucheng;ZHU Xiaofeng;YE Junzhu;WANG Ziyi(School of Science,Hubei University of Technology,Wuhan 430068,China;Wuhan Radium Health Science and Technology Co.,Ltd,Wuhan 430071,China)

机构地区：[1]湖北工业大学理学院,武汉430068 [2]武汉镭健科技有限责任公司,武汉430071

出　　处：《激光杂志》2024年第10期33-38,共6页Laser Journal

基　　金：国家重点研发计划(No.2023YFF0715800);国家自然科学基金青年项目(No.61805075);武汉市科技计划项目(No.2020BED021)资助项目。

摘　　要：报道了适合于医疗应用的高能量脉冲激光二极管(LD)泵浦Tm:YAG激光器,通过理论模拟和试验研究了脉冲Tm:YAG激光器振荡运转和输出特性,结果显示:Tm:YAG激光器在脉冲泵浦状态下产生剧烈的驰豫振荡,可输出高峰值功率子脉冲,用适当重复频率泵浦时,多脉冲泵浦反转粒子的叠加效应可显著提高单脉冲输出能量,低频脉冲运转时,激光器阈值高,不利于激光器输出。实验中在重复频率120 Hz、脉宽600μs情况下,输出最大激光能量476 mJ,光光效率26.4%;在泵浦平均功率300 W时,得到68.2 W的平均功率输出,光光效率22.7%。此高能量脉冲2μm激光输出实验,为激光医疗应用提供参考。A high energy pulsed laser diode(LD)pumped Tm:YAG laser suitable for medical applications is reported.The oscillation operation and output characteristic of the Tm:YAG laser are studied by theoretical simulation and experiment.The results show that the pulsed Tm:YAG laser generates intense relaxation oscillation under pulse pumping state,and can output subpulses with high peak power.When pumped at an appropriate repetition rate,the superposition effect of reversed particles in multi-pulse pumping can significantly increase the single pulse energy.When operating with low-frequency pulses,the laser has a high threshold,which is not conducive to the output.In the experiment,the maximum single pulse energy is 476 mJ at a frequency of 120 Hz and a pulse width of 600μs,corresponding to an optical conversion efficiency of 26.4%.At an average pump power of 300 W,an average power output of 68.2 W is obtained,with an optical efficiency of 22.7%.The experiment of high energy pulsed laser output at 2μm above provides reference for laser medical applications.

关 键 词：Tm:YAG激光器 脉冲激光二极管 脉冲能量 驰豫振荡 子脉冲 

分 类 号：TN29[电子电信—物理电子学]