John Ballato is an American materials scientist, entrepreneur, and academic. He holds the J. E. Sirrine Endowed Chair of Optical Fiber and is a professor of materials science and engineering, electrical and computer engineering, as well as physics and astronomy at Clemson University. He has received many international recognitions for his research on optical and optoelectronic materials, particularly as relates to optical fiber. Ballato is a Fellow of the American Ceramic Society (ACerS), Optica (formerly the Optical Society of America, OSA), the International Society for Optical Engineering (SPIE), the Institute of Electrical and Electronics Engineers (IEEE), the American Association for the Advancement of Science (AAAS), and the American Physical Society (APS). He is also a member of World Academy of Science, the US National Academy of Inventors, and Aspen Global Leadership Network (AGLN), and serves as editor of the journal Optical Materials. He is an active participant on the "Photonic Glasses and Optical Fibers" technical committee for the International Commission on Glass.
Education Ballato studied at Rutgers University, and received his bachelor's degree in ceramic science and engineering in 1993, and a PhD in ceramic and materials engineering in 1997. His undergraduate research and thesis was conducted under the guidance Elias Snitzer. His doctoral dissertation, Sol-Gel Synthesis of Rare Earth Doped Halide Optical Materials for Photonic Applications, was supervised by Richard Riman.
Career Ballato began his career as an assistant professor of ceramic and materials engineering at Clemson University in 1997. He was promoted to associate professor in 2002 and became a professor of materials science and engineering in 2007. Along with the latter appointment, he has held secondary appointments as professor of electrical and computer engineering since 2009, and as professor of physics and astronomy since 2021. Ballato held several administrative appointments throughout his career. He served as Director of the Center for Optical Materials Science and Engineering Technologies at Clemson University from 2000 until 2014. During this time period, he also held concurrent appointments as Faculty Representative to the (Clemson University) Board of Trustees, and as vice president for Research and Economic Development. Prior to becoming J. E. Sirrine Endowed Chair of Optical Fiber in 2015, he served as vice president for economic development. In 2019, he was elected as Director of the AVX Corporation, a position he served in until their acquisition by Kyocera. Ballato is the co-founder of South Mechanic Street Group, and AEOS Fiber Optics. In 2001, he co-founded Tetramer Technologies.
Research Ballato has published more than 600 scientific papers. He has focused his research on the use of optical materials and structures for the purpose of gaining high-value photonic and optoelectronic applications. His research group develops specialty optical fibers for high energy laser, biomedical, and industrial uses. He has 35 issued patents. While studying at Rutgers University, Ballato and his mentor, Elias Snitzer, invented a new process for manufacturing optical fibers, the "Molten Core Method." Later, in 2013, Ballato reconsidered the materials that can be used to make commercially relevant optical fibers with properties not otherwise possible using conventional fabrication approaches. He put a particular emphasis on the expansion of the molten core approach to a wide variety of novel yet practical fibers. He has shown the molten core process to be amenable to the fabrication of both glassy and crystalline fibers. Relating to the glassy fibers, he developed a range of crystal-derived all-glass fibers that exhibited very low optical nonlinearities. Relating to the crystalline core fibers, Ballato was the first to use the molten core method to fabricate long lengths of glass-clad semiconductor fibers, opening the door to their greater availability and application. It is for this body of work that many of his awards relate. Ballato's study and development of optical fibers also extends into infrared glasses and fibers. Moreover, his research paved the way to device-level implementation of two novel light-guiding approaches, transverse Anderson localization and gain-guiding in an index-antiguiding fiber, with potential applications in lasers and imaging. In addition to his body of work in optical fiber, Ballato also has studied and made contributions to long-term ordering in semiconductors, nanograin-sized transparent ceramics, numerous passive and active optical polymers, and ferroelectric ceramics.
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