损耗均匀且平顶的蚀刻衍射光栅波长路由器  

Etched Diffraction Grating Wavelength Router with Uniform-Loss and Flat-Passband

作　　者：穆鸽 何建军(指导)[1] 

机构地区：[1]浙江大学现代光学仪器国家重点实验室,光学及电磁波研究中心,浙江杭州310027

出　　处：《光学学报》2016年第6期70-75,共6页Acta Optica Sinica

基　　金：国家自然科学基金(61535010);国家863计划(2013AA014401)

摘　　要：提出了一种弧形齿面蚀刻衍射光栅波长路由器,通过合理设计齿面形状,可以同时提高器件的损耗均匀特性和频谱通带带宽。设计了基于InP平台,中心波长1550nm,通道间隔400GHz的4×4波长路由器。仿真结果显示,各通道之间的损耗差异可由8.1dB减小到0.8dB,频谱响应形状为平顶,1dB带宽由0.3nm增加到1.6nm,并可以通过调整设计参数,平衡器件的损耗均匀程度、带宽和整体损耗。实验结果显示,各通道间差异为3.1dB,1dB带宽约为1.1nm,器件串扰低于-12dB,验证了该方法的正确性。该方法无需增加器件尺寸或引入额外结构,可应用于任何材料平台的蚀刻衍射光栅器件。An etched diffraction grating wavelength router（EDGR）with arc-shaped grating teeth is proposed,and the loss uniformity and spectral passband of the device can be improved simultaneously with proper design for the shape of the grating teeth.A 4×4EDGR with 400 GHz channel spacing,centered at 1550 nm and based on InP platform is designed.Simulation results show that the loss difference of all channels is reduced from 8.1dB to0.8dB.The shape of the spectral response is flat-top and the 1dB bandwidth is increased from 0.3nm to 1.6nm.By adjusting the design parameters,the loss uniformity,bandwidth and entire loss of the device can be balanced.Experimental results show that the loss difference of all channels is 3.1dB and 1dB bandwidth is 1.1nm.The crosstalk of the device is better than-12 dB.The validity of this method is verified.This method does not need to increase the chip size or add extra elements,which can be applied to etched diffraction gratings in any material platform.

关 键 词：光通信 蚀刻衍射光栅 波长路由器 损耗均匀 平顶型通带 全光路由 

分 类 号：TN256[电子电信—物理电子学]