基于聚合物分散液晶全息光栅的可调增益均衡器  

Tunable Gain Equalizer Base on the H-PDLC Grating

作　　者：丁维银[1] 蔡继光[1] 沈国土[1] 杨宝成[1] 郑继红[2] 顾玲娟[2] 庄松林[2] 

机构地区：[1]华东师范大学物理系 [2]上海理工大学光学与电子信息工程学院,上海200093

出　　处：《光子学报》2005年第4期511-515,共5页Acta Photonica Sinica

基　　金：上海市光科技资助项目(NO:c-23)

摘　　要：从理论和实验两方面分析研究了聚合物分散液晶全息光栅在632.8nm光波的入射下的衍射谱特性和电压可调特性,实验结果与耦合波理论的计算结果具有很好的一致性,从实验上验证了用耦合波理论来描述聚合物分散液晶全息光栅的衍射特性是恰当的.并且提出了利用聚合物分散液晶全息光栅对掺饵光纤放大器增益谱进行平坦化的方法,利用聚合物分散液晶全息光栅的电压可调特性可实现动态增益均衡.运用该方法,可使掺饵光纤放大器在C波段1530～1560 nm内,温度在0℃～65℃范围内变化,掺饵光纤放大器自发辐射谱的不平坦度从3.3dB降到0.2dBp-p(峰-峰值).The structure and the properties of the holographic polymer dispersed liquid crystal (H-PDLC) grating were explored and analyzed both theoretically and experimentally. The results of the experiment are consistent with those of the theory. Coupled-wave theory is used to analyze and explain the properties of the grating. The grating was used to flatten the gain of EDFAs and dynamic gain equalization can be implemented with the electrically controlled gratings. The gain from 1530 nm to 1560 nm can be flattened with the fluctuation of the amplified spontaneous emission decreased from 3.3 dB to less than 0.2 dBp-p in the temperature range 0-65°C.

关 键 词：光通信 掺铒光纤放大器 可调增益均衡器 聚合物分散液晶全息光栅 

分 类 号：TN929.11[电子电信—通信与信息系统]