【作者】 文泓桥； 盛钟延； 石志敏； 何赛灵；

【Author】 Hongqiao Wen, Zhongyan Sheng, Zhimin Shi and Sailing He State Key Laboratory for Modern Optical Instrumentation, Center for Optical and Electromagnetic Research, Zhejiang University, Hangzhou, 310027

【机构】 浙江大学现代光学仪器国家重点实验室光及电磁波研究中心；

【摘要】 凹面光栅型解复用器是平面波导密集波分复用器件中很有发展潜力的一种。本文讨论了用两点聚焦法实现凹面光栅型解复用器通带平坦化的设计方法,该方法能在不增加工艺复杂度的情况下,有效实现波分复用器件频谱响应的平坦化。通过基于标量波动衍射理论的数值模拟,对器件的性能进行了分析。模拟结果表明,两点聚焦设计法能将器件的3dB带宽和1dB带宽分别提高到原来的3.18倍、4.11倍,额外产生的功率损耗约4.7dB,同时串绕也由原来的-50dB增加到-20dB。更多还原

【Abstract】 A concave grating based integrated demultiplexer is one of the most promising typesof planar waveguide DWDM devices. A concave grating is designed to have two focal points ateach output channel and thus give a flat spectral response. A numerical simulation based on thescalar wave theory is used to analyze the characteristics of the device. The numerical resultsshow that, the 3dB passband wdith and 1dB passband width of the improved design is 3.18 and4.11 times of convention design, respectively, and the excess loss is 4.7dB.更多还原