1 浙江大学光电科学与工程学院现代光学仪器国家重点实验室, 集成光电子研究中心, 浙江 杭州 310027
2 中国计量大学光学与电子科技学院, 浙江 杭州 310018
通过在阵列波导的出口末端加入辅助波导,实现一种输入和输出通道数均为7(7×7),通道间隔为400 GHz的氮氧化硅阵列波导光栅路由器(AWGR),以提高损耗均匀性。利用引入的辅助波导调节在输出自由传输区的像平面处的场分布,通过优化其结构参数在像平面获得了平顶形状的场分布。与传统的AWGR相比,当光从中心输入通道输入时,带有辅助波导的AWGR所测得的输出损耗不均匀性从2.09 dB减少为0.76 dB;而当光从边缘输入通道输入时,输出通道输出的损耗不均匀性从1.99 dB降低为0.88 dB,可满足实际光通信、光互连等系统的需求。由于辅助波导的引入,中心通道的最小插入损耗从2.99 dB增加为3.82 dB,边缘通道的最小插入损耗从4.83 dB增加为5.46 dB。所有通道的串扰约为18 dB。
光学器件 波导 光栅 集成光学器件 导波应用 光学学报
2019, 39(11): 1123001
Author Affiliations
Abstract
1 State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China
2 College of Science, Zhejiang University of Technology, Hangzhou 310028, China
We present compact silicon-arrayed waveguide grating routers (AWGRs) with three different channel spacings of 20, 6.4, and 3.2 nm for optical interconnect systems. The AWGR with the 20 nm channel spacing shows a low loss of 2.5 dB and a low crosstalk of 20 dB and has a footprint of only 0.27 mm×0.19 mm. The AWGR with the channel spacing of 6.4 nm has loss ranging from 3 to 8 dB, and the crosstalk is 18 dB. As for the 3.2 nm channel spacing, the loss is about 4 dB, and the crosstalk is 12 dB.
060.1810 Buffers, couplers, routers,switches, and multiplexers 130.3120 Integrated optics devices 200.4650 Optical interconnects Chinese Optics Letters
2017, 15(3): 030603
