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利用碘酸锂晶体对Ｈｅ－Ｎｅ激光器６３２．８ｎｍ谱线进行腔内倍频，得到了３１６．４ｎｍ的连续紫外输出。对光学元件进行优化后，采用的三镜折叠谐振腔给出了１．５ｍＷ的紫外光输出
The intracavity frequency doubling of the 632.8 nm line of He-Ne laser with lithium iodate crystals gave a continuous UV output of 316.4 nm. After optimization of the optics, the three-mirror folded resonator used gave a 1.5 mW UV output