A 3.5-mW continuous-wave difference-frequency source around 3 μm for sub-Doppler molecular spectroscopy
A 3.5-mW continuous-wave difference-frequency source around 3 μm for sub-Doppler molecular spectroscopy
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DOI：
10.1007/s00340-004-1714-0
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发表时间：
2005-06
期刊：
影响因子：
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通讯作者：
P. Maddaloni;G. Gagliardi;P. Malara;P. De Natale
中科院分区：
文献类型：
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作者：
P. Maddaloni;G. Gagliardi;P. Malara;P. De Natale
报道了一种基于差频产生的中红外可调谐相干辐射源的研制。来自两个连续波掺稀土放大器的信号光和抽运光混合到一个双极化铌酸锂晶体中，产生2.9-3.5 μm光谱范围的辐射。据我们所知，第一次实现了几mW的输出功率。我们表明，这样的权力可以利用高分辨率的分子吸收光谱的调查。在CH_4 ν_3基带的一些振转跃迁中观察到了饱和Lamb-dip。
We report the development of a mid-infrared tunable coherent radiation source, based on difference-frequency generation (DFG). The signal and pump beams coming from two cw rare-earth-doped amplifiers are mixed into a periodically-poled LiNbO3crystal to produce radiation in the 2.9–3.5 μm spectral range. For the first time to our knowledge, an output power of several mW has been achieved. We show that such a power can be exploited for high-resolution investigation of molecular absorption spectra. Saturation Lamb-dips have been observed for a number of ro-vibrational transitions belonging to the CH4ν3fundamental band.