title: Ultraviolet-assisted frequency trimming of optical microsphere resonators.
abstract: We have demonstrated the engineering of a precise shift in the resonance frequency of high-Q (10(8))whispering-gallery modes in microspheres of germanium-doped silica with UV irradiation. With 600 mW of 351-nm radiation from an Ar-ion laser, 18-GHz permanent frequency shifts were obtained for modes of 1550-nm wavelength, enough to tune a resonance over a full free spectral range.
authors.affiliation: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109, USA. anatoliy.savchenkov@jpl.nasa.gov
authors.forename: A A
authors.initials: AA
authors.lastname: Savchenkov
authors.forename: V S
authors.initials: VS
authors.lastname: Ilchenko
authors.forename: T
authors.initials: T
authors.lastname: Handley
authors.forename: L
authors.initials: L
authors.lastname: Maleki