College of Engineering

ECE Seminar Speaker: Dr. Yifei Li

Date(s): 11/14/2012 2:00 PM - 11/14/20123:30 PM
Location: SENG Building (Group II) Room 213A
Contact: Honggang Wang 508-999-8469


At the early phase of Monolithic Microwave Integrated Circuits (MMIC), which initially focused on phased array antennas with very large number of TR modules, the notion of a fiberoptic feed-network (i.e. RF/Photonic links) with true time beam steering emerged and thus microwave photonics (MWP) was born. MWP promised efficient, low cost routing of microwave signals on top of optical carriers while exploiting the positive attributes of photonics, including large bandwidth, low loss, lightweight, and immunity to electromagnetic interference. However, with the exception of a few specific applications, poor dynamic range prevented its adaptation. Recent works in MWP strived to improve the dynamic range of MWP by developing a new high dynamic range coherent phase modulated (PM) link. Significant progress has been made and proof of concept coherent PM RF/photonic links have demonstrated SFDR values in the range of 130 dB∙Hz2/3, which already suppressed the state-of-the-art. This seminar will present our latest efforts photonic integrated circuits for high dynamic range coherent PM RF/photonic links.

Dr. Yifei Li received his B.Eng. in Optoelectronics from Huazhong University of Science and Technology, China, in 1996. He received his MS (July 2001) and Ph.D.(Sept. 2003) in Electrical Engineering both from Drexel University, Philadelphia, PA. From 2003 to 2007, he was a research faculty with the Center for Microwave / Lightwave Engineering, Drexel University. In 2007, he joined the ECE Department of the University of Massachusetts Dartmouth, where he is the director of the RF/Photonics Lab. His current research interests include: RF/photonics, photonic integrated circuits, and laser physics. His work in hybrid optical / digital processing of microwave signals won him the European Microwave Association (EuMA) Young Scientist Prize (1st prize) in the 12th Colloquium on Microwave Communications. He also won the 2008 DARPA young faculty award for his work in integrated photonic frequency mixer.

The Seminar is open to the public free of charge.

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