| VRM腔高光束质量高功率双波长激光器 |
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| 引用本文： | 靳全伟,庞毓,蒋建锋,谭亮,崔玲玲,魏彬,万敏,高清松,唐淳.VRM腔高光束质量高功率双波长激光器[J].红外与激光工程,2018,47(11):1105003-1105003(5). |
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| 作者姓名： | 靳全伟 庞毓 蒋建锋 谭亮 崔玲玲 魏彬 万敏 高清松 唐淳 |
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| 作者单位： | 1.中国工程物理研究院应用电子学研究所,四川 绵阳 621999; |
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| 基金项目： | 国家自然科学基金（61705208） |
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| 摘 要： | 研制的双波长短脉冲激光器采用大模体积腔+渐变反射率输出镜技术，对二极管泵浦棒状激光介质产生的热透镜及热退偏进行补偿，在500 Hz下实现了谐振腔短脉冲能量140 mJ，脉宽约17.76 ns的1 064 nm激光输出，20 min能量不稳定性RMS值小于0.3%，激光光束质量M21.6。该实验结果与采用MOPA技术路线谐振腔+预放的方式技术指标相当，但采用谐振腔的技术路线结构简单紧凑。采用水热法生长抗灰迹效应的GTR-KTP晶体作为倍频晶体，相位匹配方式选择Ⅱ类相位匹配，倍频后532 nm激光单脉冲最高能量96 mJ，最高倍频效率68.6%，激光光束质量M22.1。通过能量调节设计，实现了线偏振态1 064 nm和532 nm激光功率连续可调共光轴输出。
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| 关 键 词： | 高光束质量 渐变反射率输出镜 高倍频效率 双波长 能量可调 |
| 收稿时间： | 2018-06-05 |
High beam quality and high power dual-wavelength laser with VRM |
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| Affiliation: | 1.Institute of Applied Electronics,Chinese Academy of Engineering Physics,Mianyang 621999,China;2.Key Laboratory of Science and Technology on High Energy Laser,Chinese Academy of Engineering Physics,Mianyang 621999,China;3.Postgraduate Department,Chinese Academy of Engineering Physics,Beijing 100088,China |
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| Abstract: | The double wavelenghs short pulse laser was developed with the high mode volume and variable reflectivity mirror(VRM). The thermal lens and the thermal birefringence produced by diode-lasers pumped rod laser medium was compensated, which presented a short-pulse energy of 140 mJ and 1 064 nm laser output with a pulse width of 17.76 ns at a repetition rate of 500 Hz. The beam quality value was M21.6, and the energy instability(RMS) value of 20 minutes was less than 0.3%. The result of resonator was corresponded with Master Oscillator Power-Amplifier(MOPA) technology, but it was close and neat. The maximum laser energy of 96 mJ at 532 nm was demonstrated by extra-cavity second-harmonic generation(SHG) with type-Ⅱ angle phase-matched GTR-KTP crystal, the KTP crystals with resistance to grey trace effect was grown by hydrothermal method. The maximum efficiency of SHG was 68.6%, and the beam quality value was M22.1. The 1 064 nm and 532 nm laser were output at same axis with energy regulation. |
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