有源弯曲波导反馈特性的三维时域有限差分法仿真  

Study on Feedback of Curved Active Waveguide with Three Dimensional FDTD Simulation

作　　者：段子刚[1] 柴广跃[1] 

机构地区：[1]深圳大学光电子学研究所广东省光电子器件与系统重点实验室,深圳518060

出　　处：《光子学报》2007年第7期1235-1237,共3页Acta Photonica Sinica

基　　金：国家自然科学基金(60377012);深圳市科技计划项目(200423)资助

摘　　要：半导体光放大器的耦合光纤形成的外腔反馈通过引入弯曲损耗得以抑制.通过对半导体光放大器有源波导引入对前、后向光场非对称散射损耗,以前向光场部分损耗为代价,反馈光场能量被分布式地较强辐射.时域有限差分法仿真研究表明,通过优化弯曲有源波导的结构,相对于通常的有源直波导,在相同的材料增益和输入、输出条件下,反馈可以下降10 dB以上.由此可以简化高增益半导体光放大器的器件结构.The feedback of external cavity formed by coupling fibers of SOA is constrained by introducing curved loss of active waveguide. The energy of feedback optical field is radiated greatly under the cost of partial loss for forward propagation field by introducing elaborately designed asymmetrical curved structure of active waveguide. It is shown from FDTD analysis, that under the condition of the same material gain and the same both input and output, compared with straight one, the feedback of asymmetrical cured active waveguide is reduced more than 10 dB, which results in the possibility of simple device structure of high performance SOAs.

关 键 词：半导体光放大器 有源弯曲波导 反馈抑制 

分 类 号：TN248.4[电子电信—物理电子学]