The processes responsible for the generation of a supercontinuum are identified though the simulation of the nonlinear Schrodinger equation by Split-step Fast Fourier Transform Method.

利用分步傅立叶法数值模拟了广义的非线性薛定谔方程， 分析研究了 多种条件下超 连续光谱的产生过程；

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Fast Fourier Transform (FFT) is an effective method to detect harmonic.

快速付立叶变换(FFT)是对谐波进行检测的有效方法。

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The standard method for spectrum analysis in digital signal processing is the discrete Fourier transform(DFT), typically implemented using a fast Fourier transform(FFT) algorithm.

数字信号处理中标准的频谱分析方法是离散傅立叶变换（DFT），典型的实现方法是快速傅立叶变换（FFT）。

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