一、引 言 光学信息处理系统具有二维、并行、高速地完成傅里叶变换、相关和卷积等线性运算的能力.在典型的光学处理器以及低功率的情况下,除非使用特殊的技术,一般只能实现线性运算.但是,许多信息处理的应用又要求对数据进行非线性运算.过去,非线性变换主要是通过数字方法实现 I. INTRODUCTION The optical information processing system has the capability of performing linear operations such as Fourier transform, correlation and convolution in a two-dimensional, parallel and high-speed manner. In a typical optical processor and low-power case, unless a special technique is used, Generally only linear operations can be implemented, however, many applications of information processing require non-linear operations on data. In the past, nonlinear transformations were mainly implemented digitally