Linearity optimization of edge filter demodulators in FBG_s

作     者：LI Dong-sheng SUI Qing-mei CAO Yu-qiang 

作者机构：Optical Fiber Sensor Technology and Engineering Research Center Shandong University Jinan 250061 China 

出 版 物：《Optoelectronics Letters》 (光电子快报（英文版）)

年 卷 期：2008年第4卷第3期

页      面：193-195页

核心收录：

学科分类：070207[理学-光学] 07[理学] 0702[理学-物理学] 

主　　题：光纤 解调器 线性分析 分析方法 

摘      要：A kind of electric circuit is improved to optimize the linearity of edge filter demodulators in FBG .By using a logarithm amplifier and an extraction operation, the linear range of optimized edge filter demodulators has been broadened effectively, and the requirement of optical filter＇s linear range has been reduced. Theoretical analyses and the simulation results indi-cated that the linear range of optimized edge fdter demodulator＇s covers the whole transition region of the edge filter, while a strict linearity of the optical filter is not necessary.