Resonant sum and difference frequency mixing in Hg
Resonant sum and difference frequency mixing in Hg
复制标题
Hg 中的谐振和频与差频混合
DOI：
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发表时间：
1983
期刊：
影响因子：
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通讯作者：
R. Wallenstein
中科院分区：
文献类型：
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作者：
R. Hilbig;R. Wallenstein
窄谱宽的相干可调谐 VUV 辐射是由汞蒸气中脉冲染料激光辐射的双光子谐振和和差频混合 (omega_{vuv}^{pm} = 2omega_{uv} pm omega_{D}) 产生的。 UV 频率 ω uv 调谐至双光子共振 61S 0 - 71S 0 ( lambda_{uv} = 3127.6 A)、61S 0 -61D 2 ( lambda_{uv} = 2802.9 A) 和 61S 0 - 71D 2 ( lambda_{uv} = 2594.5 A)。第二个染料激光器产生 ω D ( lambda_{D} = 4200-6700 A) 的可调谐辐射。在 1-2 MW 的输入功率下，不同的转换方案在 1090 至 1960 A 之间的光谱区域中生成通常为 0.5-3 kW 的 VUV 光脉冲。实验结果提供了有关所生成的 VUV 输出的波长依赖性、转换效率、相位匹配条件以及转换限制饱和现象的信息。除了谐振频率转换之外，还研究了谐振跃迁 61S 0 -61P 1 (lambda = 1849.5 A) 附近 lambda_{vuv} = 1800-1880 A 处的非谐振频率三倍和混合。
Coherent tunable VUV radiation of narrow spectral width is generated by two-photon resonant sum and difference frequency mixing (omega_{vuv}^{pm} = 2omega_{uv} pm omega_{D}) of pulsed dye laser radiation in Hg vapor. The UV frequency ω uv is tuned to the two-photon resonances 61S 0 - 71S 0 ( lambda_{uv} = 3127.6 A), 61S 0 -61D 2 ( lambda_{uv} = 2802.9 A), and 61S 0 - 71D 2 ( lambda_{uv} = 2594.5 A). A second dye laser produces tunable radiation at ω D ( lambda_{D} = 4200-6700 A). At input powers of 1-2 MW, the different conversion schemes generate VUV light pulses of typically 0.5-3 kW in spectral regions between 1090 and 1960 A. The experimental results provide information on the wavelength dependence of the generated VUV output, on the conversion efficiency, the phase-matching conditions, and on conversion limiting saturation phenomena. Besides the resonant frequency conversion, nonresonant frequency tripling and mixing is investigated at lambda_{vuv} = 1800-1880 A in the vicinity of the resonance transition 61S 0 -61P 1 ( lambda = 1849.5 A).