Cheng Ru, Zhang Daming, Wang Jihou, Wang Chunxue, Gao Fengli, Sun Xiaoqiang, Shi Zuosen, Cui Zhanchen, Chen Changming
Opt Express. 2019 Apr 29;27(9):12883-12898. doi: 10.1364/OE.27.012883.
In this work, thermo-optic tunable 4 × 4 cascaded multimode interference based integrated optical waveguide switching matrices are designed and fabricated using photopolymer lightwave circuits. The materials of the waveguide core and cladding are fluorinated epoxy-terminated copolycarbonate and polymethylmethacrylate, respectively. The driving power that controls matrices for binary encoding of different optical switching states are simulated and analyzed. The measured insertion loss of the actual chip is < 7.1 dB and the maximum crosstalk in adjacent channels is <-30 dB. The switching time is approximately 220 μs and the extinction ratio is obtained as 21.5 dB. This flexible encoding technique can be applied for achieving optical code-division multiple-access network coders.
在这项工作中，基于热光可调谐4×4级联多模干涉的集成光波导开关矩阵采用光聚合物光波电路进行设计和制造。波导芯层和包层的材料分别是氟化环氧封端的共聚碳酸酯和聚甲基丙烯酸甲酯。对控制矩阵以实现不同光开关状态二进制编码的驱动功率进行了模拟和分析。实际芯片的测量插入损耗<7.1 dB，相邻通道的最大串扰<-30 dB。开关时间约为220 μs，消光比为21.5 dB。这种灵活的编码技术可用于实现光码分多址网络编码器。
