增益平坦拉曼放大器优化算法研究  

Optimal Algorithm of Flat-Gain Raman Amplifier

作　　者：唐嘉[1] 谢康[1] 姜海明[1] 叶莲[1] 

机构地区：[1]电子科技大学光电信息学院,四川成都610054

出　　处：《光学与光电技术》2008年第2期25-28,共4页Optics & Optoelectronic Technology

基　　金：国家杰出青年基金(60588502);国家自然科学基金(60607005);四川省科技攻关计划(2006Z02-010-3)资助项目

摘　　要：在分析受激拉曼散射耦合方程的基础上,介绍了一种反向设计多波长抽运光纤拉曼放大器的方法,并使用一种改进遗传算法和新型打靶法,讨论了体现特定的高增益和宽带平坦的适应度函数,对抽运波长和功率进行了优化,得到高增益,宽带平坦的增益谱,其开关增益可达15dB,增益带宽达80nm,增益波动小于1dB,这种放大器结构比现有的宽带光纤放大器在增益平坦上有一定的进步。A method for inverse designing multiwave-length pumped fiber Raman amplifiers was presented, based on the a- nalysis of the coupled equation for the stimulated Raman scattering. By using a modified genetic algorithm and a novel shoot- ing method the appropriate choices of the fitness for the high and flat gain were discussed. The pumping wavelengths and powers were optimized. The flat-gain and high-gain spectrum in broad band were obtained, in which the on-off gain was 15 dB, the bandwidths was up to 80 nm, and the Raman gain rippled was less than 1 dB. Compared to the exiting wide-band optical fiber amplifiers, the gain flatness was improved.

关 键 词：拉曼放大器 遗传算法 优化 平坦增益 

分 类 号：TN929.11[电子电信—通信与信息系统]