Associate Professor
Institute of Information and Communication Technology
Research Interests: Silicon Photonics, Silicon Optoelectronics
Office Phone: 86-10-6276 7911
Email: liyp[at]pku.edu.cn
Li, Yanping is an associate professor in School of Electronics. She obtained her B.Sc. and M.Sc. from Central China Normal University in 1999 and 2002, and Ph.D. from Institute of Semiconductors, Chinese Academy of Sciences in 2005 respectively. Her research interests include silicon photonics and optoelectronics.
Dr. Li has published more than 30 research papers, and most of them are published in top-tier journals and conferences, such as IEEE Photon. Technol. Lett., Opt. Exp., Appl. Opt., Opt. Commun., OFC, CLEO, etc.
Dr. Li has chaired and taken part in several research projects including NSFC projects, 973 programs, 863 program, etc. Her research achievements in recent years about silicon based devices in optical communication systems are summarized as follows:
1) 90o-Hybrids: Optical 90o-hybrid is a prerequisite component in coherent receiving system. She proposed and demonstrated several 90o-hybrid structures. Especially, she proposed a compact hybrid without any phase shifter and waveguide crossing in coherent receiving system. And based on it, she realized an ultra-compact integrated dual-polarization optical 90o-hybrid, in which the PBS and the hybrids for both polarizations were fabricated in a single-etch process.
2) Polarization splitters and rotator: The photonic devices based on SOI are usually severely polarization-sensitive, and the polarizations handling devices are important in PIC. She demonstrated several PBSs based on silicon. In addition, she proposed a novel hybrid plasma PR utilizing asymmetrical directional coupling between a hybrid plasma waveguide and a strip dielectric waveguide. It provides a new approach to design ultra-compact and low-loss polarization selective devices.
3) Mode multiplexer: Mode-division multiplexing technology is an alternative technique to expand the optical transmission capacity. She proposed a compact mode (de)multiplexer utilizing the asymmetrical directional coupling between a hybrid plasma waveguide and a silicon nanowire waveguide. It can be extended to more channels and applied to enhance the transmission capacity of PIC.
