WUHAN, China (April 28, 2017) - Wuhan Optoelectronics Forum No. 118 was successfully held in Auditorium A101 at Wuhan National Laboratory for Optoelectronics (WNLO) in the morning of April 28. Prof. Yikai Su from Shanghai Jiao Tong University delivered an exciting talk entitled Silicon photonic devices for signal processing in wavelength, polarization and mode. Dr. Jian Wang, from Optoelectronic Devices and Integration Division of WNLO chaired the forum. Prof. Xinliang Zhang, Deputy Director of WNLO, awarded Prof. Su the forum medal.

We experimentally demonstrate optical filtering, polarization splitting and rotating, and mode (de)multiplexing and switching in silicon devices. We firstly demonstrate silicon photonic filters based on Sagnac loop reflectors, including a wavelength and bandwidth-tunable comb filter, and two compact interleavers in the Michaelson interferometer and interfering loop configurations with compact footprints. We then discuss a high extinction-ratio (30 dB) silicon polarization beam splitter (PBS) based on a grating-assisted contra-directional coupler (GACC), and an ultra-compact silicon polarization splitter and rotator (PSR) with a short coupling length of 8.77 micron. We further talk about optical switching in wavelength, mode, and polarization. We demonstrate a 2x2 nanobeam thermal-optic switch with ultra-small mode volumes, a high tuning efficiency of 1.23 nm/mW and an ultra-low switching power of 0.16 mW.    We then propose a mode- and polarization-selective switch (MPSS) architecture for next generation high capacity switching systems, and demonstrate 1x2 and 2x2 on-chip MPSS switches.

Yikai Su (Ph.D. in EE) graduated from Northwestern University, Evanston, IL, USA in 2000. He worked at Crawford Hill Lab of Bell Laboratories in the summer of 1999 (MTS-I), and from 2001 to 2003 (MTS). From 2004 he has been with the faculty of Shanghai Jiao Tong University, Shanghai, China. Currently he is a full professor, the director of the optical transmission and integrated photonics lab, and the director of the center for advanced electronic materials and devices. His research area covers silicon photonic devices, optical transmission, switching, and analog processing. He has over 300 publications with >3000 citations (scopus search), and holds ~50 patents. Prof. Su served as an advisory board member of Advanced Optical Materials (2015- ), an associate editor of APL Photonics (2015- ) and OSA Photonics Research (2013- ), a topical editor of Optics Letters (2008-2014), and a guest editor of IEEE JSTQE (2008/2011). He is the chair of the IEEE Photonics Society Shanghai chapter. He also served as a TPC member of a large number of international conferences including CLEO, ECOC, OFC, etc.