摘要
中红外可调谐激光已被广泛应用于医疗、军事,以及环保等领域。利用1064 nm激光抽运磷酸钛氧钾(KTP)晶体光参量振荡器(OPO)产生2.6μm波长可调谐参量激光。该光参量振荡器采用腔外单谐振结构,利用Ⅱ类相位匹配的方式获得了最大的非线性系数。实验实现了2.4~2.8μm的波长调谐范围,并在155 mJ泵浦能量下,获得了最大单脉冲能量为12.6 mJ、转化效率为8.1%、光束质量为5倍的衍射极限。
Mid-infrared tunable laser is widely used in several fields,such as medical,military,and environmental protection.Herein,a tunable parametric laser with a central wavelength of 2.6μm is generated by pumping a KTP crystal based optical parametric oscillator(OPO).The OPO employs an extra-cavity single resonance structure.Type-II phase matching is used to obtain a maximum nonlinear coefficient.Experimental results demonstrate that the wavelength of the oscillator can be adjusted in the range of 2.4-2.8μm.The maximum pulse energy is 12.6 mJ with a pumping energy of 155 mJ,whereas the conversion efficiency is 8.1%.The beam quality is measured to be five-fold of the diffraction limit.
作者
李浩宁
张大成
朱江峰
田文龙
刘寒
康仁铸
魏志义
Li Haoning;Zhang Dacheng;Zhu Jiangfeng;Tian Wenlong;Liu Han;Kang Renzhu;Wei Zhiyi(School of Physics and Optoeletronic Engineering,Xidian University,Xi’an,Shaanxi 710071,China;Key Laboratory of Photophysics of Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2019年第11期213-218,共6页
Acta Optica Sinica
基金
中央高校基本科研业务专项资金(XJS17025)
国家自然科学基金青年基金(61705174)
关键词
激光光学
中红外
可调谐激光
光参量
光束质量
纳秒脉冲
laser optics
mid-infrared
tunable laser
optical parameter
beam quality
nanosecond pulse
