Yoshida Shuhei, Horiuchi Shuma
Appl Opt. 2017 Jul 10;56(20):5607-5613. doi: 10.1364/AO.56.005607.
Photopolymers are widely used as a recording medium in holographic data storage, but they shrink during polymerization. We proposed a nonlinear shrinkage model to numerically evaluate the effect of photopolymer shrinkage on signal quality. Specifically, we developed both a numerical model in which the shrinkage factor is determined locally according to the light intensity, and a numerical simulation method that can handle computational lattices distorted by shrinkage. We clarified the influence of shrinkage on diffraction efficiency, angle selectivity, wavelength selectivity, signal-to-noise ratio, and symbol error rate. This study provides useful information for system design of holographic data storage.
光聚合物在全息数据存储中被广泛用作记录介质，但它们在聚合过程中会收缩。我们提出了一个非线性收缩模型，以数值方式评估光聚合物收缩对信号质量的影响。具体而言，我们开发了一个数值模型，其中收缩因子根据光强度局部确定，还开发了一种数值模拟方法，该方法可以处理因收缩而扭曲的计算晶格。我们阐明了收缩对衍射效率、角度选择性、波长选择性、信噪比和符号错误率的影响。本研究为全息数据存储的系统设计提供了有用信息。
