二维相位计算单元的全光实现

All-optical realization of two-dimensional phase computing unit

相位的计算在二维傅里叶变换等光学计算中有着很重要的作用,在G-S算法等相位恢复算法中更是有着较多的应用。提出了一种全新的相位叠加方案,除了器件本身的光电转换特性外,不需要外加非光学的辅助单元,用全光的方式实现了相位的线性叠加。通过对该计算单元原理和基本构架进行理论分析和计算机仿真,证明了方案的可行性。设计的计算单元既可以用于光学模拟计算中的相位计算环节,也可以用来作为能够保持相位信息的光束连接器。

Calculation of phase plays a very important role in optical Fourier transform and it also has lots of applications in phase retrieval algorithm and the G-S algorithm,etc. A new phase overlay scheme is presented, which does not require additional non-optical auxiliary unit, achieving the function in pure optical way. The theoretical analysis and com- putational simulation of the basic framework principles are made to prove the feasibility of the program. This scheme can be used as a phase calculating unit in optical computing, and also be used as an optical beam connector which can keep the phase information.