光子晶体增益平坦滤波器的设计  

Design on Photonic Crystal Gain Flatness Filters

作　　者：李志全[1] 康莉莉[1] 苏凤燕[1] 高鹏[1] 

机构地区：[1]燕山大学电气工程学院,河北秦皇岛066004

出　　处：《中国激光》2009年第3期710-712,共3页Chinese Journal of Lasers

基　　金：河北省自然科学基金(20070216004)资助课题

摘　　要：掺铒光纤放大器(EDFA)的增益平坦化是波分复用(WDM)系统中的重要问题。提出了用光子晶体实现增益平坦的新方案。通过分析EDFA增益平坦的原理与一维光子晶体的反射谱(在不同波长处具有不同反射率的特性),设计出了满足特定条件的增益平坦滤波器。以EDFA典型曲线为例,利用遗传算法简便精确地优化一维光子晶体的周期数,从而设计出了与EDFA增益谱相匹配的增益平坦滤波器。结果表明,级联的一维光子晶体滤波器在1530～1560 nm范围内对EDFA的增益进行平坦,且不平坦度约为±0.6 dB。Gain flatness of erbium doped fiber amplifier (EDFA) is a critical issue for wavelength division multiplex (WDM) system, and realizing this function by photonic crystal is a new scheme proposed in this paper. We designed the gain flatness filter satisfied with special condition by analyzing the principle of gain flatness of EDFA and the different reflection character of one dimension (1-D) photonic crystal whose reflectivity is different at different wavelength. Taking the typical gain spectra of EDFA for example, we optimized the period of optical crystal conveniently and exactly using the genetic algorithm and finally designed the gain flatness filter matched with the gain spectra of EDFA. The results show that the designed cascaded 1-D optical crystal filter can flat the gain of EDFA in the range of 1530-1560 nm and the non-flatness degree is about ±0.6 dB.

关 键 词：光子晶体 增益平坦 遗传算法 掺铒光纤放大器 

分 类 号：TN253[电子电信—物理电子学]