Low-Loss, Low-Crosstalk, and Large-Scale Optical Switch Based on Silicon Photonics
Low-Loss, Low-Crosstalk, and Large-Scale Optical Switch Based on Silicon Photonics
复制标题
DOI：
10.1109/jlt.2019.2934768
复制
发表时间：
2020-01-15
影响因子：
4.7
通讯作者：
Ikeda, Kazuhiro
中科院分区：
文献类型：
--
作者：
Suzuki, Keijiro;Konoike, Ryotaro;Ikeda, Kazuhiro
综述了基于硅光子学的严格无阻塞光开关的研究进展。我们开发了一种基于互补的金属-氧化物-半导体中试线和光电封装技术的开关芯片制造工艺。我们演示了最多32个输入端口x 32个输出端口的全路径传输和交换，平均光纤到光纤插入损耗为10.8分贝。此外，我们还展示了在8 x 8开关中使用双Mach-Zehnder元件开关时，对于-30分贝串扰，工作带宽大于100 nm。对于偏振不敏感的操作，我们采用了偏振分集方案，并用光纤偏振分束器和两个开关芯片制作了一个8×8的开关。8×8开关的偏振相关损耗小于0.5分贝。此外，在一片芯片上集成了偏振分集旋转器和两个开关矩阵的片上极化分集8×8开关显示出差分群延迟小于1ps。在现有技术的基础上，我们讨论了进一步扩大港口数量的前景以及商业部署仍然面临的挑战。
We review the research progress of strictly nonblocking optical switches based on silicon photonics. We have developed a switch chip fabrication process based on a complementary metal-oxide-semiconductor pilot line and optical and electrical packaging technologies. We demonstrated all-paths transmission and switching of up to 32 input ports x 32 output ports with an average fiber-to-fiber insertion loss of 10.8 dB. Furthermore, we demonstrated an operating bandwidth wider than 100 nm for -30 dB crosstalk with double-Mach-Zehnder element switches in an 8 x 8 switch. For polarization-insensitive operation, we adopted a polarization diversity scheme and fabricated an 8 x 8 switch with fiber-based polarization-beam-splitters and two switch chips. The 8 x 8 switch exhibited a polarization-dependent loss of less than 0.5 dB. Moreover, an on-chip polarization diversity 8 x 8 switch integrated with polarization splitter rotators and two switch matrices on a single chip demonstrated a differential group delay less than 1 ps. Based on current technologies, we discuss the prospects for further port count expansion and remaining challenges for commercial deployment.