基于液晶的可调谐太赫兹双折射滤波器的设计  

Design of tunable THz birefringent filter based on liquid crystal

作　　者：吕英进[1] 徐德刚[1] 刘鹏翔[1] 吕达[1] 王鹏[1] 姚建铨[1] 

机构地区：[1]天津大学精仪学院,教育部光电信息技术科学重点实验室,天津300072

出　　处：《激光与红外》2011年第4期450-454,共5页Laser & Infrared

基　　金：国家自然科学基金项目(No.60801017)资助

摘　　要：液晶双折射滤波器具有室温下工作,调谐简单方便,带宽窄等优点。为了达到设计不同调谐范围和带宽的这种滤波器的目的,以满足实际应用的需要,扩大其应用范围,采用数值模拟的方法,进行参数计算和设计思路的总结,并设计了一套窄带输出的滤波器实例。结果表明,通过对影响滤波器调谐范围和输出带宽的关键参数的数值模拟和分析,为设计不同调谐范围的液晶双折射滤波器提供了依据;设计实例基本上满足预期的设计要求,调谐范围0.691~0.866 THz。Liquid crystal birefringent filter has advantages of room temperature operating,simple tuning,narrow bandwidth and better output characteristics.In order to design such filters with different tuning range and bandwidth to meet the needs of practical application,we make numerical simulation,select the device parameters and summarize the design ideas.We designed a narrow band transmission filter with output tuning range of 0.691~0.866 THz.The results show that through numerical simulation and analysis of key parameters that impact the tuning range and output bandwidth of the filters,design scheme can be set up for liquid crystal birefringent filter with different tuning range.The design example meets the expected requirements well.

关 键 词：光学器件 太赫兹 液晶 调谐 双折射滤波器 

分 类 号：O441.4[理学—电磁学]