Hannover 2016 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 28: Laser Development I

Q 28.3: Talk

Wednesday, March 2, 2016, 11:30–11:45, a310

Oscillator-pumped femtosecond laser source with nearly gap free tuning range from 1.4 to 12 μm — •Florian Mörz, Tobias Steinle, Andy Steinmann, and Harald Giessen — 4th Physics Institute and Research Center SCOPE, University of Stuttgart, 70550 Stuttgart,Germany

We present a femtosecond laser source that provides infrared radiation between 1.4 and 12 μm. The setup consists of a multi-Watt mid-infrared optical parametric master oscillator power amplifier (MOPA) that is tunable from 1370 nm to 4120 nm, and a difference frequency generation (DFG) stage, in which the MOPA signal and idler are mixed. The MOPA generates up to 4.3 W average output power at 1370 nm, corresponding to a photon conversion efficiency of 78 %. Nearly Fourier-limited pulses and excellent power stability are observed. The DFG setup provides radiation of up to 50 mW average output power at 6 μm and several mW up to 12 μm at a passive long term stability of < 1 % RMS. This MOPA DFG setup is pumped by a single Yb:KGW femtosecond oscillator with 8 W average pump power.