Michel Digonnet is a Professor in the Applied Physics Department at Stanford University. He received the degree of engineering from Ecole Supérieure de Physique et de Chimie de la Ville de Paris, the Diplome d’Etudes Approfondies in coherent optics from the University of Paris, Orsay, France, and the M.S and Ph.D in Applied Physics from Stanford University. His current interests include ultrahigh-precision fiber sensors, including fiber optic gyroscopes, strain and temperature sensors using slow-light fiber Bragg gratings, and acoustic sensors based on nanometric membranes. He is also actively involved in investigating exceptional points for sensing applications, as well as optical cooling of rare-earth-doped fibers and fiber lasers. He has published about 380 articles and issued more than 140 patents. Several of his patents have been licensed and are broadly used worldwide, including the invention with co-inventor John Shaw of the fiber optic amplifier, which is now the backbone of the high-speed Internet and communication. He has edited several books, chaired numerous conferences on fiber components, optical materials, and fiber sensors, and taught courses on these topics.