基于硅基二氧化硅阵列波导光栅宽带低串扰单纤三向器  

Wide Bandwidth Low Crosstalk Triplexers Based on Silica AWG

作　　者：李俊一[1] 安俊明[1] 吴远大[1] 李建光[1] 王红杰[1] 胡雄伟[1] 

机构地区：[1]中国科学院半导体研究所光电研发中心,北京100083

出　　处：《光子学报》2010年第2期205-209,共5页Acta Photonica Sinica

基　　金：国家高技术研究发展计划(2006AA03Z420;2007AA03Z420);国家自然科学基金(60776057;60837001;60877014)资助

摘　　要：采用硅基二氧化硅阵列波导光栅设计并制作了宽带低串扰单纤三向器.为使三个波长间隔相差较大的输出谱获得相同的带宽,在输出波导与罗兰圆交界采用了不同结构的多模干涉器.二维有限差分束传播法的模拟结果表明,理论上1310nm、1490nm和1550nm波长的3dB带宽分别达到23nm、23.5nm和25nm,插入损耗均为4dB,1310nm波长的串扰小于-40dB,1490nm与1550nm波长间串扰小于-40dB;采用宽带光源测试结果表明,1550nm波长的3dB带宽为23nm,采用三个独立窄带光源测试结果表明,三个波长的插入损耗均为7dB,1310nm波长的串扰小于-40dB,1490nm与1550nm波长间的串扰小于-39dB,测试与模拟结果基本一致.A wide bandwidth low crosstalk triplexer is designed and fabricated using silica arrayed waveguide gratings （AWGs）. In order to obtain wide bandwidth for all three wavelengths whose wavelength differences are large, multimode interferences（MMIs）with different structures are used at the junction between output waveguides and Rowland circle. Using two-dimensional finite difference beam propagation method,the simulated results show that 3 dB bandwidth of the designed triplexer are up to 23 nm,23.5 nm and 25 nm for 1 310 nm,1 490 nm and 1 550 nm,respectively. The insertion losses all are 4 dB. The crosstalk is less than --40 dB for 1 310 nm,and are less than --40 dB for 1 490 nm and 1 550 nm. Using broadband light source,the measured results show that 3dB bandwidth for 1 550 nm is 23 nm. Using three independent narrowband light sources,the measured results show that the insertion losses of the three waves all are 7 dB. The crosstalk is less than --40 dB for 1 310 nm,and are less than --39 dB for 1490 nm and 1 550 nm. The measured and simulated results are basically consistent.

关 键 词：集成光学 单纤三向器 平面光波导 阵列波导光栅 多模干涉器 光纤到户 

分 类 号：TN256[电子电信—物理电子学]