Keisuke Kojima was born in Hokkaido, Japan, in 1958. He received the B.S., M.S., and Ph.D. degrees in electrical engineering from the University of Tokyo, Tokyo, Japan, in 1981, 1983, and 1990, respectively. He also received the M.S. degree from the University of California, Berkeley, CA, USA, in 1982. He worked for eight years at the Central Research Laboratory, Mitsubishi Electric Corp., from 1983 on the research of narrow linewidth lasers and AlGaAs/GaAs DFB and DBR lasers. He spent nine years at AT&T/Lucent Bell Laboratories on the R&D of uncooled Fabry– Perot and DFB lasers, vertical-cavity surface-emitting lasers, passive optical network systems, and metro optical systems, first as a Member of Technical Staff, and later as a Technical Manager. He also worked at Agere Systems, Denselight Semiconductors, and TriQuint Semiconductors on optical devices and modules, and optical systems testbed. He has been with Mitsubishi Electric Research Laboratories, Cambridge, MA, USA, since 2005, where he is currently working on the R&D of photonic-integrated circuits and coherent optical systems, as a Senior Principal Research Scientist. He has more than 190 publications in journals and conference proceedings. He is a Fellow of the Optical Society of America.