William S. C. Chang is an Emeritus Professor of the Department of Electrical and Computer Engineering, University of California, San Diego (UCSD). After receiving his PhD from Brown University in 1957, he also taught at Stanford University, the Ohio State University and Washington University, St Louis. He pioneered maser and laser research at Stanford, and he has been involved in guided-wave research at Washington University and UCSD since 1971. He has published over 200 technical papers and several books, including Fundamentals of Guided-Wave Optoelectronic Devices (Cambridge University Press, 2009), Principles of Lasers and Optics (Cambridge University Press, 2005) and RF Photonic Technology in Optical Fiber Links (Cambridge University Press, 2002).