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非线性光学晶体Na3La9O3(BO3)8的高功率纳秒激光三倍频特性研究
引用本文:唐光鑫,刘旺,王丽荣,李云飞,张玲,张国春.非线性光学晶体Na3La9O3(BO3)8的高功率纳秒激光三倍频特性研究[J].人工晶体学报,2022,51(3):398-403.
作者姓名:唐光鑫  刘旺  王丽荣  李云飞  张玲  张国春
作者单位:1.中国科学院半导体研究所,中国科学院半导体材料科学重点实验室,北京 100083;2.中国科学院理化技术研究所,北京人工晶体研究与发展中心,中国科学院功能晶体与激光技术重点实验室,北京 100190;3.中国科学院大学,北京 100049
基金项目:北京市科学技术委员会、中关村科技园区管理委员会资助项目(Z211100004821006)
摘    要:本文对新型非线性光学晶体Na3La9O3(BO3)8(NLBO)三倍频产生355 nm紫外纳秒激光的特性进行了研究。以重复频率10 kHz、脉冲宽度10 ns的高功率1 064 nm调Q激光器作为基频光源,采用I类相位匹配的LBO和NLBO晶体分别作为倍频晶体和三倍频晶体,获得平均输出功率152.5 mW的355 nm紫外纳秒激光输出,为目前采用NLBO晶体获得355 nm紫外激光的最高输出功率。本文还研究了NLBO晶体在实现三倍频最佳输出时晶体偏转角度随温度的变化规律,从实验角度对NLBO晶体在不同温度下的三倍频最佳相位匹配角度进行了修正。

关 键 词:非线性光学  NLBO晶体  三倍频  相位匹配角  紫外激光  激光输出功率  
收稿时间:2022-01-10

Characterization of Third Harmonic Generation of High Power Nanosecond Laser on Nonlinear Optical Crystal Na3La9O3(BO3)8
TANG Guangxin,LIU Wang,WANG Lirong,LI Yunfei,ZHANG Ling,ZHANG Guochun.Characterization of Third Harmonic Generation of High Power Nanosecond Laser on Nonlinear Optical Crystal Na3La9O3(BO3)8[J].Journal of Synthetic Crystals,2022,51(3):398-403.
Authors:TANG Guangxin  LIU Wang  WANG Lirong  LI Yunfei  ZHANG Ling  ZHANG Guochun
Affiliation:1. Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China;2. Key Laboratory of Functional Crystals and Laser Technology, Beijing Center for Crystal Research and Development, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;3. University of Chinese Academy of Sciences, Beijing 100049, China
Abstract:The characteristics of 355 nm ultraviolet (UV) nanosecond (ns) laser generation using third harmonic generation (THG) method based on the new nonlinear optical (NLO) crystal Na3La9O3(BO3)8(NLBO) were investigated. A Q-switched high-power 1 064 nm laser with repetition frequency of 10 kHz and pulse width of 10 ns was applied as the fundamental laser source. A type I phase-matched LBO crystal was used for the second harmonic generation (SHG) and a type I phase-matched NLBO crystal was used for the THG. The output power of 355 nm UV laser is 152.5 mW, and this is the highest output power of 355 nm UV laser generated by NLBO crystal. The variation of the crystal deflection angle with temperature when the NLBO crystal achieved the optimal THG output was studied, and the optimum phase matching angles at different temperatures were modified.
Keywords:nonlinear optics  NLBO crystal  third harmonic generation  phase matching angle  ultraviolet laser  laser output power  
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