离散傅里叶变换是数字信号处理中最核心的数学工具之一。传统基于数字电路的离散傅里叶变换方法受限于电子器件的速度，难以满足高速信号处理要求，尤其制约了太比特每秒超高速光处理技术的发展。基于并行光学向量矩阵乘法器原理的离散傅里叶变换方法，利用光传播的高速和低损耗特点，提出以相位空间光调制器为核心变换矩阵的全光并行离散傅里叶变换方法，并通过实验进行了验证。实验结果显示，所提出的全光并行离散傅里叶变换误差小于0.13，通过进一步的模块集成和性能提升，该方法将在高速光信号处理中有较大的应用潜力。

Fourier transform is one of the keys of the mathematical tools in digital signal processing. The performance of traditional discrete Fourier transform based on digital circuit is restricted to the electronic device speed, which is difficult to meet the requirements of the high speed of signal processing, especially restricting the development of Tbit/s super-speed optical processing technology. The discrete Fourier transform method based on the parallel optical vector matrix on time-multiplier principle is studied. The features of high speed and low heat dissipation of light are utilized and putting all optical parallel discrete Fourier transform method with phase only spatial light modulator as the core of transformation matrixes is put forward, which gets verifications by means of experiment. The experimental results show that the proposed all optical parallel discrete Fourier transform has less error (about 0.13). With further modulation and promotion of function, the method can have widely potential application in the high speed optical signal processing.