Special Seminar - Prof. Andrew Weiner (Purdue), Tuesday Nov. 16, 3:30 PM, Phys/Astro 102

Alireza Marandi marandi at stanford.edu
Fri Nov 12 09:50:02 PST 2010


Special Seminar Presented by the Stanford Optical Society

Ultrabroadband Radio-Frequency Photonics

Andrew M. Weiner

Scifres Distinguished Professor of Electrical and Computer Engineering, Purdue University

Tuesday, November 16, 3:30 PM, Physics and Astrophysics 102

Refreshments at 3:15 PM

 

Radio-frequency (RF) technology is ubiquitous in systems ranging from wireless communications to radar and electronic warfare.  Conventional RF systems are usually designed to operate at low instantaneous bandwidth with signals possessing a well defined center frequency (that may be tuned slowly over a large range).  Furthermore, although such systems generally employ coherent, phase-based signaling schemes within their narrow instantaneous frequency band, control of phase across large frequency bands is usually not considered.   On the other hand, optical systems can be extremely broadband, generating pulses with durations down to femtoseconds and with terahertz instantaneous bandwidths.  Such ultrashort pulse optical systems are fundamentally time-domain in nature, and control of phase over the full bandwidth is crucial. 

In this talk I discuss research in which sophisticated systems for manipulating time-domain ultrashort pulse photonic signals via coherent parallel processing in the optical frequency domain are adapted for generation, processing, and application of ultrabroadband RF electrical signals.  Examples include: photonic approaches for generating complex short pulse RF waveforms with instantaneous bandwidths up to tens of GHz, well beyond what is available via existing electronics solutions; novel photonic methods for implementing programmable matched filters for compression of burst RF signals with instantaneous bandwidths up to ~15 GHz; and experiments demonstrating the compensation of strong dispersive effects observed upon impulse excitation of broadband antenna pairs. 

About the Speaker:

Andrew M. Weiner graduated from M.I.T. in 1984 with an Sc.D. in electrical engineering.  Upon graduation he joined Bellcore, first as Member of Technical Staff and later as Manager of Ultrafast Optics and Optical Signal Processing Research.  Prof. Weiner moved to Purdue University in 1992 and is currently the Scifres Distinguished Professor of Electrical and Computer Engineering. His research focuses on ultrafast optics signal processing and applications to high-speed optical communications and ultrawideband wireless.  Prof. Weiner is author of a textbook entitled Ultrafast Optics (Wiley, 2009) and has published seven book chapters and approximately 235 journal articles.  He is author or coauthor of over 400 conference talks and has 12 U.S. patents.  Prof. Weiner is a Fellow both of the Optical Society of America and of the Institute of Electrical and Electronics Engineers (IEEE) and is a member of the U.S. National Academy of Engineering. He has won numerous awards for his research, including the Hertz Foundation Doctoral Thesis Prize (1984), the Adolph Lomb Medal of the Optical Society of America (1990), the Curtis McGraw Research Award of the American Society of Engineering Education (1997), the International Commission on Optics Prize (1997), and the Alexander von Humboldt Foundation Research Award for Senior U.S. Scientists (2000).  He is joint recipient, with J.P. Heritage, of the IEEE LEOS William Streifer Scientific Achievement Award (1999) and the OSA R.W. Wood Prize (2008) and has been recognized by Purdue University with the inaugural Research Excellence Award from the Schools of Engineering (2003) and with the Provost's Outstanding Graduate Student Mentor Award (2008).  In 2009 Prof. Weiner was named a U.S. Dept. of Defense National Security Science and Engineering Faculty Fellow.  Prof. Weiner has served as Co-Chair of the Conference on Lasers and Electro-optics and the International Conference on Ultrafast Phenomena, as Secretary/Treasurer of the IEEE Lasers and Electro-optics Society (LEOS), and as a Vice-President of the International Commission on Optics (ICO).  He is currently serving as Chair of the National Academy of Engineering’s U.S. Frontiers of Engineering Meeting.

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