Rapidly Spectral Ramping of an ultra-wide Tuneable Femtosecond Non-collinear Optical Parametric Oscillator (NOPO) with high average output power

The 3 W NOPO pumped by a frequency doubled thin-disk laser is rapidly tunable from 650 to 950 nm by varying the resonator length. First measurements prove the concept up to 500 Hz ramping frequencies.