基于透明铁电陶瓷的高速可变光衰减器  

High Speed Variable Optical Attenuator Based on Transparent Ferroelectric Ceramics

作　　者：陈捷[1] 曹永良[1] 章献民[1] 陈抗生[1] 邹英寅[1] 

机构地区：[1]浙江大学信息与电子工程学系,浙江杭州310027

出　　处：《压电与声光》2006年第1期21-22,26,共3页Piezoelectrics & Acoustooptics

基　　金：浙江省科技计划重点项目基金资助项目(No.2004C21G2010007)

摘　　要：透明铁电陶瓷具有很高的电光效应和快速的响应时间,但其存在回滞效应且受温度影响大,存在稳定性问题。该文采用后反馈闭环控制技术,有效地克服了这一缺点,制成了高性能的高速可变光衰减器模块。实验结果表明该器件模块的响应时间约10μs,衰减动态范围大于25 dB,插入损耗小于0.6 dB。Transparent ferroelectric ceramics possess very high electro-optic effect and fast electro-optic response, however there exist hysteresis and quite large temperature dependence. Therefore the stability is very critical. To overcome this disadvantage, the back closed-loop control is employed to fabricate the high speed variable optical attenuator module based on transparent ferroelectric ceramics. The results indicate that the response time is about 10 μs, dynamic range is 25 dB, and insertion loss is less than 0.6 dB.

关 键 词：可变光衰减器 透明铁电陶瓷 闭环控制 

分 类 号：TN253[电子电信—物理电子学]