title: Combination of a continuous-wave optical parametric oscillator and a femtosecond frequency comb for optical frequency metrology.
abstract: We combined a tunable continuous-wave optical parametric oscillator and a femtosecond Ti:sapphire laser frequency comb to provide a phase-coherent bridge between the visible and the mid-infrared spectral ranges. As a first demonstration of this new technique we performed a direct frequency comparison between an iodine-stabilized Nd:YAG laser at 1064 nm and an infrared methane optical frequency standard at 3.39 microm.
authors.affiliation: Institut für Physik, Humboldt-Universität zu Berlin, Germany. evgeny.kovalchuk@physik.hu-berlin.de
authors.forename: E V
authors.initials: EV
authors.lastname: Kovalchuk
authors.forename: T
authors.initials: T
authors.lastname: Schuldt
authors.forename: A
authors.initials: A
authors.lastname: Peters