Seok-Hwan Jeong received a B.S. degree in material engineering from Sungkyunkwan University, Korea, in 1997, and M.S. and Ph.D. degrees in electrical and electronic engineering from Tokyo Institute of Technology, Japan, in 2000 and 2003. He was a post-doctorate researcher with NTT Photonics Laboratories, Japan, from 2003 to 2005, where he was involved in research on InP-based widely tunable filters and laser diodes. In 2005, as a post-doctoral researcher, he joined the AIST, Japan, where he was involved in the research on GaAs-based photonic crystal devices and nanofabrication technology. He was with Fujitsu Laboratories Ltd. from 2006 to 2019, where he worked on the research and development of InP-based and Si-based photonic integrated devices such as optical switches, optical demodulators for coherent detection, external cavity lasers, and optical demultiplexers for WDM applications. Since Nov. 2012, he has also been involved with the Photonics Electronics Technology Research Association (PETRA), Japan, targeting low-cost silicon photonics integrated optical transceivers. He was a Manager with Fujitsu Limited, Japan, and a Chief Researcher with the PETRA project. Since 2019, he has been a full-time faculty member and Professor at the Department of Semiconductor Engineering at the University of Suwon, Korea.