Speaker: Yitang Dai

Affiliation: Beijing University of Posts and Telecommunications

Academic title: Professor

Honorary title: New Century Excellent Talent Program of the Ministry of Education

Abstract:

With the rapid development of RF technology to high-speed and intelligent direction, there is an urgent need to break through the traditional digital and analog technology facing the "bandwidth bottleneck", to enhance the signal processing capabilities of electronic systems. Here, we propose that the “microwave photonic discrete-frequency processing” is a novel way for broadband analog signals. We summarize the arbitrary amplitude and phase control of RF spectrum with up to MHz resolution, which is called “RF waveshaper”. The unique phase, delay, and dispersion control is demonstrated, as well as applications in rapidly-tunable delay line, real-time Fourier transform, time stretching and reversal. Optical devices used for microwave signal tend to have poor spectral resolution, thus becoming a performance constraint for spectrum processing. We show the “bandwidth scaling” technique would be a feasible way to achieve both broad band and high resolution, as well as the integration.

Biography:

Yitang Dai received the B.S. and Ph.D. degrees in electronic engineering from Tsinghua University, Beijing, China, in 2002 and 2006, respectively. From 2007 to 2008, he was engaged in postdoctoral research with the University of Ottawa, Ottawa, ON, Canada. From 2008 to 2010, he was engaged in postdoctoral research with Cornell University, Ithaca, NY, USA. He is currently a Professor with the State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, China. His research interests include microwave photonics signal generation and processing, analog optical computing, and integrated photonics.