新型液晶器件的制备研究及其在光通信中的应用  

Research on the Novel Liquid Crystal Grating Device and Its Application in Optical Communication

作　　者：李文萃[1] 王世文[1] 李雄[1] 黄文彬[2] 

机构地区：[1]河南省电力公司信息通信公司,郑州450052 [2]中国科学院长春光学精密机械与物理研究所应用光学国家重点实验室,长春130033

出　　处：《科技通报》2015年第9期144-147,共4页Bulletin of Science and Technology

摘　　要：制备了一种新型光栅器件,它在制备体系中加入一定比例的液晶材料,使器件制备方法简单、体积小、响应速度快,而且具有衍射特性的电场可调性,在光通信领域有很好的应用前景。首先通过分析光栅的形成机理,指出了只有当液晶和光敏单体的扩散、成核和凝胶三个过程得到最佳匹配状态,才能形成比较理想的光栅器件,本文选用了两种丙烯酸酯单体作为反应体系,分别为五官能度的DPHPA和双官能度的PDDA,它们以1∶1的比例均匀混合,,同时在体系中添加少量的光引发RB、共引发剂NPG,采用一次全息曝光的方法,制备了衍射效率高达98.1%的液晶光栅。而且,此器件的透射光强度可以随着外加电场的变化而连续变化,能够在传输信道中实时改变和控制光信号的强弱,因此这种新型液晶光栅无源光通信器件方面具有巨大的潜在生产力。A novel liquid crystal grating device with high diffraction efficiency was investigated in this paper. The diffractive light intensity of liquid crystal grating can be modulated by electric field because of the electric control characteristics of liquid crystal. According to optical theories and formation mechanism of the grating, ideal grating can be obtained utilizing special recipe and technique, due to the diffusion, nucleation and gelation match between monomers and liquid crystals. Penta-functional dipentaerythritol hydroxyl pentaacrylate, di-functional phthalic diglycol diacrylate and nematic liquid crystal TEB30A were chosen in this paper. The diffraction efficiency can reach to 98.1%. The transmitted light intensity of the liquid crystal grating can be continuously variable under the effect of an external electric field. So that, the light power of transmission signals in the communication channel can be adjusted according to the requirement. Consequently, the liquid crystal grating has immense potential productivity in passive optical communication device such as optical switching and variable optical attenuator.

关 键 词：液晶光栅 衍射效率 电控特性 光通信器件 

分 类 号：TH929.1[机械工程]