High-Efficiency 2-mJ 5-kHz Picosecond Green Laser Generation by Nd:YAG Innoslab Amplifier
High-Efficiency 2-mJ 5-kHz Picosecond Green Laser Generation by Nd:YAG Innoslab Amplifier
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DOI：
10.1109/lpt.2015.2424230
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发表时间：
2015-07
影响因子：
2.6
通讯作者：
Ying Chen;Fang-qin Li;Ke Liu;Hong-yan Xu;Feng Yang;N. Zong;Yangwu Guo;Shen-jin Zhang;Jing-yuan Zhang;Q. Peng;Y. Bo;D. Cui;Zu-Yan Xu
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文献类型：
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作者：
Ying Chen;Fang-qin Li;Ke Liu;Hong-yan Xu;Feng Yang;N. Zong;Yangwu Guo;Shen-jin Zhang;Jing-yuan Zhang;Q. Peng;Y. Bo;D. Cui;Zu-Yan Xu
利用1064 nm主振荡功率放大器（MOPA）的二次谐波输出，获得了重复频率为5 kHz、高脉冲能量和高高峰功率的532 nm高效率皮秒（ps）绿色激光。MOPA是基于Innoslab结构，在二极管直接泵浦下，产生4.8-mJ，25-ps的基本激光，重复频率为5 kHz后，三级Innoslab放大系统。在基频光脉冲能量为2.93 mJ时，采用I型非临界相位匹配的三硼酸锂晶体，倍频光脉冲能量达到1.96 mJ/脉冲，脉宽为18.9 ps，对应于绿色光的峰值功率为104 MW，倍频转换效率高达67%。SHG绿色光束质量因子被测量为M2 = 1.75。
A high-efficiency picosecond (ps) 532-nm green laser with high pulse energy and high peak power at 5-kHz repetition rate was demonstrated by second-harmonic generation (SHG) from a 1064-nm master oscillator power amplifier (MOPA). The MOPA was based on the Innoslab structure under diode directly pumping, producing 4.8-mJ, 25-ps fundamental laser at the repetition rate of 5 kHz after a three-stage Innoslab amplification system. With a pulse energy of 2.93 mJ in the fundamental and using a type I noncritically phase matched lithium triborate crystal, the pulse energy of SHG was up to 1.96 mJ per pulse with a pulse width of 18.9 ps, which corresponds to a peak power of 104 MW in the green and SH conversion efficiency as high as 67%. The SHG green beam quality factor was measured to be M2 = 1.75.