Fritz Riehle received the degrees of Dipl. Phys., Dr. rer. nat., and Dr. habil. rer. nat. from the Technical University of Karlsruhe, Karlsruhe, Germany, in 1975, 1977, and 1981, respectively. His research interests include the realization of optical length and frequency standards, high-resolution spectroscopy, laser cooling, and atom interferometry. Since 2000, he has been in charge of the Optics Division of the Physikalisch-Technische Bundesanstalt (PTB) in Braunschweig. He is an Honorary Professor of the Leibniz University Hannover, where he is engaged in the Centre for Quantum Engineering and Space-Time Research.