散斑全息存储中的散斑尺寸优化

OPTIMIZATION OF SPECKLE SIZE IN SPECKLE HOLOGRAPHIC STORAGE

本文分别给出散斑全息存储中复用选择性和读出衍射效率与散斑尺寸的关系，依此定义了一个用于优化散斑尺寸的判据参量并进行优化计算。在均衡散斑尺寸对复用选择性和存储介质动态范围的不同影响下，散斑存储应选取适当的大小以获得高密度存储。

In this paper,the dependences of both multiplexing se lectivity and diffraction efficiency in the holographic data storage on the spec kle size are derived respectively.Based on these dependences,a new characteristi c parameter of speckle holographic storage is defined as the optimization criter ion.To compromise different influences of speckle size on the multiplexing selec tivity and the diffraction efficiency,the speckle size should be neither too big nor too small in order to get the high density volume holographic storage.