高效率外腔倍频产生大功率507.4nm连续激光

发布时间：2018-06-30 16:41

本文选题：激光光学 + 绿光　；参考：《中国激光》2017年07期

【摘要】：详细介绍了基于1014.8nm室温光纤激光放大器的高效外腔倍频技术,获得了大功率的507.4nm单频激光。高效的外腔倍频是由内置正入射三硼酸锂晶体的高增益环形腔实现的,最高可以获得3 W的输出功率,倍频效率高达61.5%。倍频腔输入输出功率的实验测量值与理论计算结果相符合。该倍频腔针对4 W的基频光输入设计,在最佳工作点(4W)附近倍频效率对输入功率改变不敏感。在1.5h内,绿光输出功率涨落的均方根值为1.7%。大功率稳定输出的507.4nm单频激光可通过偏硼酸钡晶体倍频产生用于冷却中性汞原子所需的253.7nm深紫外激光,也可直接用于探测镱原子~1S_0态到~3P_2态跃迁的光谱和相关实验。
[Abstract]:The high efficiency external cavity frequency doubling technology based on 1014.8nm room temperature fiber laser amplifier is introduced in detail. High power 507.4nm single frequency laser is obtained. The high efficiency external cavity frequency doubling is realized by the high gain ring cavity with the inner normal incident lithium triborate crystal. The highest output power is 3 W, and the frequency doubling efficiency is up to 61.5. 5%. The experimental measurements of the input and output power of the double frequency resonator are in agreement with the theoretical results. The frequency doubling cavity is designed for 4 W fundamental frequency optical input. The frequency doubling efficiency near the optimal operating point (4 W) is not sensitive to the change of input power. Within 1.5 h, the root mean square value of the fluctuation of green light output power is 1.7. The high-power and stably output 507.4nm single frequency laser can produce the 253.7nm deep ultraviolet laser needed for cooling neutral mercury atoms through the frequency doubling of barium metaborate crystal. It can also be directly used to detect the spectra and related experiments of the transition of ytterbium atoms from 1s 0 state to 3P 2 state.
【作者单位】：中国科学院上海光学精密机械研究所;中国科学院量子光学重点实验室和冷原子物理中心;中国科学院大学;
【基金】：国家自然科学基金(91436105) 中国科学院战略性先导科技专项(B类)(XDB21030800)
【分类号】：TN24

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