教育部春晖计划-学术讲座-Prof. Zizheng Cao, Eindhoven University of Technology

来源:信息科学与技术学院  作者:邹喜华  日期:2017-12-17  点击数:357

Topic: High throughput cascaded aperture optical receiver for eye-safe indoor optical wireless communication

Invited Speaker: Ass. Prof. Zizheng Cao

Affiliation: Eindhoven University of Technology, the Netherlands.

Time: 10:00 AM, Monday, Dec. 18, 2017 (星期一上午10:00)

Venue: X9511, Xipu Campus (犀浦校区 X9511)

Chair: Prof. Xihua Zou



Abstract: The allowed optical power for indoor optical wireless communication such as visible light communication and infrared wireless communication (IWC) is compulsorily limited to guarantee eye safety. According to ANZI Z-136 and IEC 60825-1 eye safety standards, the laser at IR wavelength (1400 nm-4000 nm) can transmit >200 times more optical power compared to visible wavelength. Due to divergent coverage and diffuse reflection, even for infrared wavelength, the received power is remarkably low. In order to receive more optical power, a large active area in a PD is required. However, the increased active area will result in decreased bandwidth due to its enlarged capacitance. Recently we proposed a novel receiver concept to overcome such electro-optical trade-off, namely cascaded aperture optical receiver (CAO-Rx). By separating the lightwave collection aperture and detection aperture, the optical efficiency and electrical bandwidth can be independently optimized. In this talk, we intend to in-depth analyze the theoretical performance of CAO-Rx and also to review our recent research on this field. We believe the concept of CAO-Rx can greatly benefit the power-limited optical wireless communication with such electro-optical trade-off broken.


Bio: Zizheng Cao (S’11- M’15) received his Bachelor of Science degree on electronic information science and technology from Hunan Normal University, Changsha, China, and his Master of Engineering on telecom engineering (awarded "Outstanding thesis of master degree" of Hunan Province, 2010) from Hunan University, Changsha, China. In 2015, he obtained his Ph.D degree with highest honor (Cum Laude) from Eindhoven University of Technology, The Netherlands. He is now working as an assistant professor in Eindhoven University of Technology focusing on the integrated optical transceivers for indoor optical wireless communication. He has published 17 first-author peer-reviewed IEEE/OSA journal articles, including an invited paper in IEEE JLT and an invited paper in IEEE JQE. He also has an invited talk about integrated optical radio beam steering systems in PIERS2014 and an invited talk in ACP2015. He was a student member of the IEEE Photonics Society. He serves as an active reviewer for many top IEEE/OSA journals. He is one recipient of Graduate Student Fellowship of IEEE Photonics Society 2014. He holds two granted Chinese patents and one US provisional patent.