Diode-pumped all-solid-state sum-frequency mixing laser at 608.1 nm
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摘要:本文报道了一种全固态腔内和频608.1 nm 器。在 谐振腔两个分臂中,两支 二极管分别泵浦Nd: YVO 4和Nd: YAG晶体,分别选择1 342 nm波长(Nd: YVO 4晶体的 4F 3/2- 4I 13/2谱线)与1 112 nm波长(Nd: YAG晶体的 4F 3/2- 4I 11/2谱线)振荡并进行腔内和频。通过优化谐振腔设计,腔内两个波长获得了较好的模式匹配。在两个分臂的交叠部分,利用LBO I类相位匹配进行和频,获得和频608.1 nm 输出。实验表明,当Nd: YVO 4与Nd: YAG晶体泵浦功率分别为600和740 mW时,获得了功率为23.8 mW、波长为608.1 nm 输出, 输出稳定、噪声低。利用本文提出的和频结构是获得608.1 nm 输出较为有效的方法。Abstract:A compact all-solid-state intracavity sum-frequency mixing laser at 608.1 nm is reported. A Nd: YAG crystal and a Nd: YVO 4crystal are pumped by two laser diodes respectively in two sub-arms of the laser cavity. In the two arms, laser wavelengths of 1 342 nm from Nd: YVO 4crystal(corresponding to the 4F 3/2- 4I 13/2transition) and 1 112 nm from Nd: YAG crystal(corresponding to the 4F 3/2- 4I 11/2transition) are selected to be mixed into 608.1 nm laser. Through optimization of the cavity design, better matching of the modes for the two wavelengths is obtained. In the overlapping of the two arms, sum-frequency mixing is generated with a type I phase-matching LBO crystal. The experiment result shows that a stable and low noisy output of 23.8 mW at 608.1 nm is obtained at the incident pump power of 740 mW for the Nd: YAG crystal and 600 mW for the Nd: YVO 4crystal. It is an efficient way to obtain 608.1 nm laser with the sum-frequency mixing structure proposed in this article.
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Key words:
- LD pumped/
- sum-frequency mixing/
- 608.1 nm laser
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图 2折叠臂中光斑直径变化(以M3镜为起点)
Figure 2.Variation of beam diameters in the folded arm(from M3)
图 3608.1 nm和频光功率随泵浦功率的变化
Figure 3.Output power of sum-frequency laser as a function of the pump power at 608.1 nm
表 1BIBO,LBO和KTP在1 112和1 342 nm和频时的参量
Table 1.Parameters of BIBO,LBO and KTP for SFM at 1 112 nm and 1 342 nm
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