傅里叶变换光谱学方法是目前红外、远红外波段最重要的一种光谱方法。
Fourier Transform Spectroscopy is now one of the most important and useful spectral methods in infrared and far infrared region.
而在各种对功能超薄膜的研究技术中，光吸收，拉曼等光谱学方法是最常见的分析手段。
Among varies research techniques of the thin film, spectroscopy methods are frequently used, especially the light absorption spectrum, the Raman spectrum, and etc.
本文用激光器模式耦合半经典理论，阐述激光腔内吸收光谱学方法的物理机制，探求影响灵敏度的因素。
The mechanism of intracavity absorption spectroscopy is described by the semiclassical theory of mode coupling in laser, and an analysis of the factors that determine sensitivity is given.
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