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首页> 外文期刊>Applied optics >Infrared intracavity laser absorption spectroscopy with a continuous-scan Fourier-transform interferometer
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Infrared intracavity laser absorption spectroscopy with a continuous-scan Fourier-transform interferometer

机译：连续扫描傅里叶变换干涉仪的红外腔内激光吸收光谱

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摘要

High-quality broadband infrared high-resolution spectra were obtained by use of the intracavity laser absorption spectroscopy technique with a Ti:sapphire laser in combination with a continuous-scan Fourier-transform (FT) interferometer. With electronic filtering used to smooth out the fluctuations of the laser power, the absorption of atmospheric water vapor in the range of 12,450-12,700 cm~(-1) was recorded at a resolution of 0.05 cm~(-1). A signal-to-noise ratio of greater than 300 was observed in this spectrum, corresponding to a minimum detectable absorption of approximately 2×10~(-9) cm~(-1). Comparison with previous measurements by use of a conventional FT technique shows that this method gives absorption spectra with highly accurate line positions along with reasonable line intensities. Investigation of the evolution of intracavity laser absorption spectra with the generation time is also shown to be possible with a continuous-scan FT spectrometer by use of the interleave rapid-scan method.
机译：通过将腔内激光吸收光谱技术与Ti：蓝宝石激光器结合使用连续扫描傅里叶变换（FT）干涉仪相结合，可获得高质量的宽带红外高分辨率光谱。通过使用电子滤波来平滑激光功率的波动，以0.05 cm〜（-1）的分辨率记录了12,450-12,700 cm〜（-1）范围内的大气水蒸气的吸收。在该光谱中观察到大于300的信噪比，对应的最小可检测吸收约为2×10〜（-9）cm〜（-1）。与使用常规FT技术的先前测量值进行的比较表明，该方法可提供具有高度精确的线位置以及合理的线强度的吸收光谱。腔内激光吸收光谱随产生时间的演变研究也表明，使用交错快速扫描法使用连续扫描FT光谱仪是可行的。

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