摘要
区别于常规的法布里-珀罗(F-P)腔增益公式,本文结合传输矩阵和载流子速率方程从理论上研究了垂直腔半导体光放大器(VC-SOA)的动态开关特性。模拟结果发现,VCSOA作为光开关应用时,可以达到ns级的开关延时和15dB以上的消光比;在满足增益需求的前提下减小顶部分布布拉格反射镜(DBR)的膜层周期,以及正确设置关状态下的抽运电流密度值略高于增益截止区水平,是同时得到较好的开关延时和输出消光比的重要因素。
The dynamic switching characteristics of vertical cavity semiconductor optical amplifier （VCSOA） are theoretically analyzed with transfer matrix method and carrier rate equation for the first time, which is different from conventional gain formula of Fabry - Perot resonator. The results show that switching delay time on the order of ns and output extinction ratio of more than 15 dB are obtained when VCSOA is used as optical switch. Meanwhile, switching delay time arid output extinction ratio can be simultaneously improved by decreasing the mirror periods of top distribution Bragg reflector （DBR） on the basis of gain and using the level which is a little larger than that of gain cancellation as the value of pump current density in the off state.
出处
《激光杂志》
CAS
CSCD
北大核心
2006年第6期34-36,共3页
Laser Journal
基金
高等学校博士学科点专项科研基金(20030613007)
国家自然科学基金(10174057)资助课题
关键词
激光器
开关
传输矩阵法
垂直腔半导体光放大器
消光比
liners
switch
transfer matrix method
vertical cavity semiconductor optical amplifier （VCSOA）
extinction ratio
