| 基于光参量振荡的35 kHz中红外激光器研究 |
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| 引用本文： | 蒋星晨,程德华,李业秋,崔建丰,岱钦.基于光参量振荡的35 kHz中红外激光器研究[J].红外与激光工程,2022,51(9):20210817-1-20210817-5. |
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| 作者姓名： | 蒋星晨 程德华 李业秋 崔建丰 岱钦 |
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| 作者单位： | 1.沈阳理工大学 理学院，辽宁 沈阳 110159 |
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| 基金项目： | 国家自然科学基金（61705145）；辽宁省高等学校创新人才支持计划（LR2016079）；辽宁省自然科学基金（20180550330）；沈阳理工大学科研创新团队建设项目（SYLUTD2020）；沈阳理工大学高水平成果建设计划 |
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| 摘 要： | 研究了基于高重频1064 nm激光泵浦的3.8 μm周期性极化铌酸锂(periodically poled LiNbO3, PPLN)光参量振荡器(optical parametric oscillator, OPO)。采用Nd :YVO4声光调Q激光器，获得了光束质量良好，重复频率25~35 kHz，最大平均输出功率6.1 W，脉冲宽度59.1 ns的1064 nm基频激光。模拟分析了在1064 nm激光泵浦下，极化周期Λ=29.5 μm MgO:PPLN晶体的温度调谐特性。通过实验，在25~200 ℃的温度范围内，获得了3599.6~3845.5 nm连续变化的中红外激光。当PPLN晶体温度为30 ℃，基频光功率为6.1 W时，得到了最大输出功率0.45 W ，重复频率为35 kHz的3845.5 nm中红外光输出。
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| 关 键 词： | 高重频 中红外 周期性极化铌酸锂 光参量振荡器 |
| 收稿时间： | 2021-11-03 |
Research on mid-infrared laser at 35 kHz based on optical parametric oscillator |
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| Affiliation: | 1.School of Science, Shenyang Ligong University, Shenyang 110159, China2.Technology Innovation Center of High Performance Laser and Application, Liaoning Province, Shenyang 110159, China |
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| Abstract: | A 3.8 μm periodically poled LiNbO3 optical parametric oscillator based on high repetition frequency pumping is studied. The Nd:YVO4 acousto-optic Q-switched laser is used, obtaining a fundamental 1064 nm laser with good beam quality, the repetition frequency at 25-35 kHz, the maximum average power of 6.1 W and the pulse width of 59.1 ns. The temperature tuning characteristic of MgO:PPLN crystal with the period Λ=29.5 μm under the 1064 nm laser pumping is simulated. Through experiments, the 3599.6-3845.5 nmmid-infrared laser is obtained at a temperature of 25-200 ℃. When the temperature of the PPLN crystal is 30 ℃and the pump power is 6.1 W, the mid-infrared laser is obtained with the maximum output power of 0.45 W and the repetition frequency of 35 kHz at 3845.5 nm. |
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