Hannover 2016 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 60: Laser Applications I

Q 60.3: Talk

Friday, March 4, 2016, 11:30–11:45, a310

Femtosecond Yb:KYW laser and applications in time-resolved spectroscopy — Nico Krauß, Gerhard Schäfer, •Changxiu Li, and Thomas Dekorsy — Department of Physics and Center of Applied Photonics, University of Konstanz, D-78457 Konstanz, Germany

High speed asynchronous optical sampling (ASOPS) is an important method for pump-probe experiments based on two femtosecond lasers without a mechanical delay line. An ASOPS system based on a GHz Yb:KYW oscillator and a Ti:sapphire oscillator is reported. The repetition rate offset between two oscillators is stabilized by a phase-locked loop to permit multi-kHz scanning rates. The GHz diode-pumped Kerr-lens mode-locked Yb:KYW oscillator with optical-to-optical efficiency of more than 45% is demonstrated. The time resolution of this system within 1 ns time window is below 350 fs and noise floor below 10⁻⁶ close to the shot-noise level within an acquisition time of 5 s can be achieved. We discuss applications of this two-colour pump-probe system.