| 高效率Nd:YVO4/LBO临界相位匹配脉冲绿光激光器 |
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| 引用本文： | 张学辉,姜梦华,刘斌,惠勇凌,雷訇,李强.高效率Nd:YVO4/LBO临界相位匹配脉冲绿光激光器[J].强激光与粒子束,2013,25(11):2831-2835. |
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| 作者姓名： | 张学辉 姜梦华 刘斌 惠勇凌 雷訇 李强 |
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| 作者单位： | 1.北京工业大学 激光工程研究院, 北京 1 001 24 |
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| 摘 要： | 报道了一种利用激光二极管（LD）端面泵浦Nd:YVO4晶体，声光调Q，LBO临界相位匹配腔内倍频的高效率、小体积、风冷绿光激光器。分析了不同偏振光泵浦的情况下，激光晶体对泵浦光的吸收特性。由分析得出，采用部分偏振光泵浦，可以提高激光晶体对泵浦光吸收均匀性，改善基波畸变，获得高转换效率激光输出。实验中，在泵浦光功率为33 W、声光调Q重复频率为20 kHz时，得到脉宽为23.96 ns、平均功率为15 W的1064 nm基频光输出。经倍频后，得到平均功率为11.2 W的绿光输出，倍频效率为74.6%，总体光-光转换效率为34%。在输出功率为10 W时，测得1 h内输出功率不稳定度为0.512 2%，水平方向和竖直方向的光束质量因子M2分别为1.2和1.1。
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| 关 键 词： | 部分偏振光 Nd:YVO4/LBO 腔内倍频 临界相位匹配 高效率 |
| 收稿时间： | 2013-01-28 |
High efficiency Nd:YVO4/LBO critical phase matching green laser |
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| Affiliation: | 1.Institute of Laser Engineering,Beijing University of Technology,Beijing 100124,China |
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| Abstract: | A high efficiency, composite and air cooling LD end-pumped Nd:YVO4, acousto-optic Q-switched, and LBO(critical phase matching) intracavity doubled all-solid-state green laser is reported. By analyzing the absorption characteristics, with different polarized light pump, the uniformity of the crystal absorption could be significantly improved when the gain medium was pumped with partially polarized light. The fundamental wave distortion could be improved and the conversion efficiency could be enhanced. When the incident pump power was 33 W, the repetition rate of the AO-Q switch is 20 kHz, a 1064 nm fundamental frequency laser with an output power of 15 W and a pulse width of 23.96 ns was obtained. The output power of 532 nm green laser was 11.2 W. The optical to optical conversion efficiency from diode to green and from IR to green laser were about 34% and 74.6%. The output power instability was 0.512 2% at the output power of 10 W, The M2 beam quality factor was 1.2 in the horizontal direction and 1.1 in the vertical direction . |
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