一种液晶调制器相位响应特性线性化的方法  

A Method for Linearization of Phase Response Generated in Liquid Crystal Modulator

作　　者：李宇波[1] 贾文建[1] 曾宇骁[1] 陈力[1] 杨建义[1] 王明华[1] 

机构地区：[1]浙江大学微电子与光电子研究所,杭州310027

出　　处：《光电工程》2009年第7期132-135,共4页Opto-Electronic Engineering

基　　金：国家自然基金资助项目(60808035)

摘　　要：作为一种用途广泛的电光器件,研究并改善液晶调制器的调制特性具有重要意义。本文通过构造一种对数型的驱动信号,实现了将液晶从0到π的非线性相位响应特性的线性化调制。同时,本文还在实验中发现了,相位响应的线性化程度会随着驱动频率的提高而降低。本文针对该现象,在应用该模型构造周期驱动信号的基础上,提出了将非线性响应映射为线性响应的方法。在不同频率的实验结果表明,从光强信号中获取0～π的线性相位响应是可行的。It is necessary to study and improve the modulation characteristics of Liquid Crystal Modulator （LCM） because of its wide application. A logarithm driving signal model is proposed to linearize the phase response of LCM between 0 and π. Furthermore, it is found out in the experiments that the degree of phase response linearization of liquid crystal modulator decreases with driving frequency increasing. To overcome this problem, this paper presents mapping the nonlinear phase response to linear one when LCM is driven by a periodic signal constructed of the logarithm model. The experimental results indicate that it is feasible to obtain the linear phase response between 0 and π.

关 键 词：液晶调制器 驱动频率 相位响应 线性化 电光器件 

分 类 号：TN29[电子电信—物理电子学] TN76