基于偏振模干涉的可变系数微波光子滤波器  

Microwave photonic filter with variable coefficients based on polarization mode interference

作　　者：张程[1] 闫连山[1] 潘炜[1] 罗斌[1] 邹喜华[1] 陈智宇[1] 卢冰[1] 

机构地区：[1]西南交通大学信息科学与技术学院,信息光子与通信研究中心,成都610031

出　　处：《强激光与粒子束》2013年第11期2846-2850,共5页High Power Laser and Particle Beams

基　　金：国家973项目;国家自然科学基金项目(61275068;61111140390)

摘　　要：基于偏振调制和光的干涉原理,设计了同时具有正系数和负系数特性的微波光子滤波器,并通过搭建实验模型证实了方案的可行性.利用偏振调制及光的偏振特性实现载波和一阶边带的正交偏振,并通过改变偏振调制器的偏置电压分别对载波和一阶边带引入相移.当载波和一阶边带的相位差为0°或90°时,利用保偏光纤快慢轴上两正交偏振光在同一偏振态上的干涉效应,分别对应实现具有负系数或正系数特性的微波光子滤波器.最后,测量并验证了0～15 GHz频率范围内滤波器的频率响应.Based on the principle of polarization modulation and optical interference, a microwave photonic filter with posi tive coefficients and negative coefficients is proposed and an experimental model is set up to verify the feasibility of the project de sign. With polarization modulation and the polarization property of light, it is achieved that the carrier and the first order side bands are in two orthogonal polarization directions. Then, the phase shift is introduced to the carrier and the first order sidebands by adiusting the bias voltage of the polarization modulator. With the optical interference effect between the two orthogona[ polari zation lights in the fast and slow axes of the polarization maintaining fiber when they are in the same polarization state, a micro wave photonic filter is achieved with negative coefficients or positive coefficients when the phase difference is 0°or .90° Finally, the frequency response of the filter with a frequency range between 0 GHz and 15 GHz is measured and veri{ied.

关 键 词：微波光子滤波器 正系数 负系数 偏振调制 偏振模干涉 频率响应 

分 类 号：TN247[电子电信—物理电子学]