基于PDLC的可变光衰减器的研制  

A Novel Variable Optical Attenuator Based on PDLC

作　　者：仲志成[1] 刘彩霞[1] 张歆东[1] 王明峰[1] 唐勇[1] 贾翠萍[1] 薛海林[1] 陈维友[1] 

机构地区：[1]吉林大学电子科学与工程学院集成光电子学国家重点实验室

出　　处：《传感技术学报》2006年第05A期1744-1746,共3页Chinese Journal of Sensors and Actuators

基　　金：国家自然科学基金资助(60377019);高等学校科技创新工程重大项目培育资金资助(705012)

摘　　要：介绍了一种新型的低成本、小体积的的液晶可变光衰减器的设计与制作.该衰减器采用聚合物分散液晶材料,使其填充在经过耦合的带透明导电电极的两根单模光纤的间隙里,利用聚合物分散液晶在不同电场强度下引起的光的散射效应的变化,来实现对光路能量的可控连续衰减.采用体硅微细加工技术术成功地制作出了这种衰减器,并对器件进行了测试,结果表明:当传输的光波长为1550nm时,该衰减器的插入损耗为0.85dB;衰减的最大范围为0.85dB-14.21dB;驱动电压范围9V^57V.A novel variable optical attenuator（VOA） based on polymer-dispersed liquid crystals（PDLC） is presented. The device employs PDI.C into the optical path of two collimated single-mode fibers with the transparent ITO electric thin films as the electrode of the PDLC. Utilized the electro-optic properties of PDLC under the condition of the different electric field intensity to realize the continuous controllable attenuate on the power of the optical path. The VOA was fabricated by silicon micromachining techniques and the performance is evaluated. The measuring results show the insertion loss of the fabricated VOA is below 0. 85dB, maximum attenuation range is about 14 dB at 1550um , and a applied voltage of VOA less than 57 volt.

关 键 词：可变光衰减器(VOA) 聚合物分散液晶(PDLC) 插入损耗 微电子机械系统 

分 类 号：TN491[电子电信—微电子学与固体电子学]