title: Single-tone frequency-modulation spectroscopy with frequency-doubled current-modulated diode laser light.
abstract: We demonstrate and characterize the generation of single-tone frequency-modulated and frequency-doubled radiation at 400 MHz and 430 nm. We obtained the radiation at 430 nm by frequency doubling light from a current-modulated 860-nm diode laser, using noncritical type I phase matching in a KNbO(3) crystal. The optical spectrum of the doubled light was found to be in keeping with our expectations based on the measured frequency- and amplitude-modulation indices of the fundamental radiation. The experimentally measured diode laser and crystal parameters were used to simulate the in-phase and quadrature signals that would be observed in a single-tone frequency-modulation spectroscopy experiment.
authors.forename: G
authors.initials: G
authors.lastname: Hancock
authors.forename: V L
authors.initials: VL
authors.lastname: Kasyutich
authors.forename: G A D
authors.initials: GA
authors.lastname: Ritchie