title: High-efficiency frequency doubling of continuous-wave laser light.
abstract: We report on the observation of high-efficiency frequency doubling of 1550 nm continuous-wave laser light in a nonlinear cavity containing a periodically poled potassium titanyl phosphate crystal (PPKTP). The fundamental field had a power of 1.10 W and was converted into 1.05 W at 775 nm, yielding a total external conversion efficiency of 95±1%. The latter value is based on the measured depletion of the fundamental field being consistent with the absolute values derived from numerical simulations. According to our model, the conversion efficiency achieved was limited by the nonperfect mode matching into the nonlinear cavity and by the nonperfect impedance matching for the maximum input power available. Our result shows that cavity-assisted frequency conversion based on PPKTP is well suited for low-decoherence frequency conversion of quantum states of light.
authors: Max-Planck-Institute for Gravitational Physics, Albert-Einstein-Institute, Leibniz Universität Hannover, Hannover, Germany.
authors: Stefan
authors: S
authors: Ast
authors: Ramon Moghadas
authors: RM
authors: Nia
authors: Axel
authors: A
authors: Schönbeck
authors: Nico
authors: N
authors: Lastzka
authors: Jessica
authors: J
authors: Steinlechner
authors: Tobias
authors: T
authors: Eberle
authors: Moritz
authors: M
authors: Mehmet
authors: Sebastian
authors: S
authors: Steinlechner
authors: Roman
authors: R
authors: Schnabel