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学术讲座0929

 
时间:2016年9月29日(星期四)下午4:15
地点:基础教学楼B座212
题目:Chaotic Laser Dynamics and Applications

摘要:
From a dynamical viewpoint, semiconductor lasers are interesting optoelectronic devices with rich nonlinearities that originate from the intracavity gain. A laser can be perturbed into a range of interesting nonlinear dynamics such as injection-locking, periodic oscillations, quasi-periodic oscillations, and chaos. These dynamics typically span the microwave frequency range, leading to various applications of the lasers as photonic microwave signal sources. This talk will summarize some recent developments in the applications of these nonlinear dynamics as exemplified by the so-called period-one (P1) state and chaotic state. In P1 states, the laser can be applied for radio-over-fiber communication as a photonic microwave oscillation with high frequency-stability, optical controllability, and wide frequency-tunability. In chaotic states, the laser can be applied for random bit generation in cryptography with minimal electronics at bit rates exceeding 0.2 Tbps. Specifically, we recently developed a scheme employing a fiber Bragg grating (FBG) for a simple and high-quality generation of random bits (SPIE Newsroom: spie.org/x119677.xml). Some fundamental issues related to the entropy associated with the laser dynamics will also be discussed.

作者简介:
Nelson Sze-Chun Chan (陳仕俊) received the B.Eng. degree in electrical and electronic engineering from the University of Hong Kong in 2001, and the M.S. and Ph.D. degrees in electrical engineering from the University of California at Los Angeles (UCLA) in 2004 and 2007, respectively. He is currently an Associate Professor in the Department of Electronic Engineering and the State Key Laboratory of Millimeter Waves at the City University of Hong Kong. His current administrative duties include Assistant Headship in the department, serving mainly for research, M.Sc., and Ph.D. programmes. He received the Dr. Bor-Uei Chen Scholarship of the Photonics Society of Chinese-Americans in 2007. He served as one of the Guest Editors of IEEE Journal of Selected Topics in Quantum Electronics (Issue on Semiconductor Lasers 2013) and a Guest Associate Editor of International Journal of Bifurcation and Chaos since 2010. His research interests include nonlinear dynamics of semiconductor lasers, optical chaos generation, radio-over-fiber, and photonic microwave generation.

 

发布时间:2016/09/29    

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