基于晶体双折射的光学FIR滤波器设计  

Optical finite impulse response filter design based on crystal birefringence

作　　者：周瑛[1] 吴国忠[2] 余飞鸿[1] 

机构地区：[1]浙江大学光电系现代光学仪器国家重点实验室,浙江杭州310027 [2]浙江大学电气学院电力电子技术研究所,浙江杭州310027

出　　处：《光电工程》2003年第2期21-24,72,共5页Opto-Electronic Engineering

基　　金：国家自然科学基金(60177013);宁波市科委浙江大学专项基金资助项目.

摘　　要：提出建立在晶体双折射基础上,由晶体延迟片堆组成的光学FIR (Finite Impulse Response) 滤波器设计方法,用以实现任意形状光谱输出。从FIR信号理论出发,建立了光学FIR滤波器数学模型,并分析了它与FIR滤波器的映射关系。在给出输出反向传递法来完成其光学实现同时,还以G/M滤波器设计实例证明其优良的光谱特性及角度特性。A design method establishing on crystal birefringence effect for a novel optical FIR (Finite Impulse Response) filter consisting of crystal delay plate stack is proposed and the spectral output in any shapes can be carried out. Starting from FIR signal theory a mathematical model for the optical FIR filter is established, and the mapping relation between the model and FIR filter is analyzed. When the output reverse transfer method is given for finishing its optical implementation, using G/M filter design as a practical example, it has simultaneously proved its good spectral property and angular property.

关 键 词：FIR滤波器 光学滤波器 光谱特性 双折射晶体 

分 类 号：TN713[电子电信—电路与系统]