光致变色双波长光存储读出信号串扰建模与消减

在材料反射率及记录信息空间分布任意的情况下，分析了双波长读出信号及其串扰，建立了理论模型.提出读出信号减去另一波长读出信号与特定系数乘积以消除线性串扰的方法，该系数仅与另一波长对应材料的摩尔消光系数有关，与材料反射率分布、记录信息等无关，也与原波长激光对应材料无关.以两种二芳基乙烯为记录介质作多波长光存储串扰消减实验，实验结果与理论相符.关键词：多波长光致变色光存储串扰

Modeling and canceling of the readout crosstalk in photochromic dual-wavelength storage

With the disk reflectivity optional and with the recording information distribut ion discretionary, this paper analyzes the readout and crosstalk in photochromic dual-wavelength storage, establishes the models for them, and presents a method to reduce the readout crosstalk. It shows that as the crosstalk of the readout of a laser corresponding to a certain material is canceled, the parameter of the method is determined only by the molar extinction coefficient of the other mate rial, and the parameter is irrelative to the disk reflectivity distribution and the recording information, even irrelative to the molar extinction coefficient of the former material. This point is validated in the readout crosstalk cancelin g experiments with the two kinds of diarylethene with different absorption spect ra.