title: Multi-Watt femtosecond optical parametric master oscillator power amplifier at 43 MHz.
abstract: We present a high repetition rate mid-infrared optical parametric master oscillator power amplifier (MOPA) scheme, which is tunable from 1370 to 4120nm. Up to 4.3W average output power are generated at 1370nm, corresponding to a photon conversion efficiency of 78%. Bandwidths of 6 to 12nm with pulse durations between 250 and 400fs have been measured. Strong conversion saturation over the whole signal range is observed, resulting in excellent power stability. The system consists of a fiber-feedback optical parametric oscillator that seeds an optical parametric power amplifier. Both systems are pumped by the same Yb:KGW femtosecond oscillator.
authors.forename: Florian
authors.initials: F
authors.lastname: Mörz
authors.forename: Tobias
authors.initials: T
authors.lastname: Steinle
authors.forename: Andy
authors.initials: A
authors.lastname: Steinmann
authors.forename: Harald
authors.initials: H
authors.lastname: Giessen