Fourier Transform Spectroscopy is now one of the most important and useful spectral methods in infrared and far infrared region.

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。

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In the high efficiency and small signal region, we investigate theoretically the efficiency enhancement mechanism of far infrared free electron laser (FIR-FEL) with a reverse tapering waveguide.

在高效率和低电流小信号范围内，理论地分析了用反向渐变波导提高远红外波导自由电子激光器(FIR - FEL)效率的机理。

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