University of California, Riverside

Department of Electrical and Computer Engineering

Distinguished Speaker: Professor Paul Yu presents a talk on "High-Power Waveguide Photodiode for Analog Application"

Distinguished Speaker: Professor Paul Yu presents a talk on "High-Power Waveguide....

Distinguished Speaker: Professor Paul Yu presents a talk on "High-Power Waveguide Photodiode for Analog Application"

November 14, 2016 - 11:10 am
Winston Chung Hall, 205/206


Analog fiber links become quite useful for a number of applications including antenna remoting, CATV, and backdrop for cellular networks. Properties such as link noise figure and spurious free dynamic range can be very demanding in some of these applications. Even more serious challenges are predicted for optical components, such as photodiode and modulator, for links intended for antenna broadcasting. For such application, high power photodiode with excellent linearity will be required at the receiver. In reviewing the properties of the material and device structures for photodiodes and anticipating high frequency application, the waveguide photodiode, in comparison to the surface normal photodiode, becomes a viable alternative for the analog photonic receiver, as well as for planar photonic integrated circuits. In contrast to the conventional waveguide photodiode which typically suffers from power saturation at the front end of the absorber waveguide, the  directional coupled (DC) waveguide is more uniform in absorption along the absorber waveguide and is thus inherently more suitable for high power operation. Simulation and experimental results of DC waveguide photodiodes for analog link applications will be presented. The underlying physical mechanisms responsible for nonlinearities at high power operation will be highlighted. 


Dr. Paul Yu is presently the William S. C. Chang Endowed Chair  Distinguished Professor of Electrical and Computer Engineering and the Provost of Revelle College at the University of California, San Diego. At UC San Diego he offers courses in solid state electronics and optoelectronics as well as conducts research on semiconductor materials and devices, integration technologies for various photonics, microwave photonics, and sensor applications. His current research projects include high-power optical detectors and silicon photonic modulators for analog fiber-links, as well as high voltage and linearity GaN/InGaN varactor and high electron mobility transistor. He served as the President of IEEE Electron Devices Society in 2012-2013 and he has been one of the society's Distinguished Lecturers for almost two decades. In 2015 he served as the interim editor-in-chief for IEEE Transactions on Election Devices. He is an elected Fellow of IEEE, AAAS, OSA and SPIE. He has published more than 160 journal papers in the area of photonics and electronics. He received a Ph.D. in Applied Physics from Caltech in 1983.

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University of California, Riverside
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Electrical and Computer Engineering
Suite 343 Winston Chung Hall
University of California, Riverside
Riverside, CA 92521-0429

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