8 March 2014 A compact and low-loss silicon waveguide crossing for O-band optical interconnect
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Proceedings Volume 8990, Silicon Photonics IX; 899002 (2014) https://doi.org/10.1117/12.2037823
Event: SPIE OPTO, 2014, San Francisco, California, United States
Abstract
Silicon photonics has attracted extensive attention in recent years as a promising solution for next generation high-speed, low energy consumption, and low cost data transmission systems. Although a few experiments indicated board-level and long haul communication capability, major and near-future application of silicon photonics is commonly seen as Ethernet at 100Gb/s and beyond, such as interconnects in data centers, where O-Band (near 1310 nm wavelength) has been standardized for its low fiber dispersion. However, almost all silicon photonics devices demonstrated up to date operate at C-Band (1530 nm to 1560 nm), the fiber loss and erbium amplification window, probably due to the wider availability of lasers and testing apparatus at this wavelength. Typical C-Band devices cannot operate at O-Band, thus the whole device library needs to be redesigned and recalibrated for O-Band applications. In this paper, we present an ultra compact, low loss, and low crosstalk waveguide crossing operating at O-Band. It is designed using the finite difference time domain method coupled with a particle swarm optimization. Device footprint is only 6 μm × 6 μm. The measured insertion loss is 0.19±0.02 dB across an 8-inch wafer. Cross talk is lower than -35 dB. We also report a second waveguide crossing with a 9 μm × 9 μm footprint with 0.017±0.005 dB insertion loss. Finally we summarize the performance of our overall O-Band device library, including low-loss waveguides, high-speed modulators, and photodetectors.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yi Zhang, Yi Zhang, Matthew Streshinsky, Matthew Streshinsky, Ari Novack, Ari Novack, Yangjin Ma, Yangjin Ma, Shuyu Yang, Shuyu Yang, Andy Eu-Jin Lim, Andy Eu-Jin Lim, Guo-Qiang Lo, Guo-Qiang Lo, Tom Baehr-Jones, Tom Baehr-Jones, Michael Hochberg, Michael Hochberg, "A compact and low-loss silicon waveguide crossing for O-band optical interconnect", Proc. SPIE 8990, Silicon Photonics IX, 899002 (8 March 2014); doi: 10.1117/12.2037823; https://doi.org/10.1117/12.2037823
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