Hannover 2016 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 60: Laser Applications I

Q 60.2: Talk

Friday, March 4, 2016, 11:15–11:30, a310

Wavelength tunable high speed femtosecond pump probe spectroscopy based on supercontinuum generation — •Lukas Ebner, Nico Krauß, and Thomas Dekorsy — Universität Konstanz

Asynchronous optical sampling (ASOPS) based on two synchronized GHz repetition rate oscillators allows performing pump-probe measurements over a time-delay window of 1ns with a signal sensitivity and temporal resolution limited only by shot noise and the pulse duration, respectively [1-3]. Here, we extend the ASOPS scheme towards wavelength tunability by spectral broadening of a GHz repetition rate Ti:sapphire oscillator in a photonic crystal fiber. The resulting supercontinuum supports ultrashort pulses with central wavelengths around 550 nm and 850-1100 nm. First two-colour ASOPS measurements with a pump wavelength of 800 nm and a continuously tunable probe wavelength are demonstrated.

1. Bartels, A. et al., Rev. Sci. Instrum. 78, 035107 (2007). 2. Gebs, R. et al., Opt. Express 18, 5974-5983 (2010) 3. Krauß, N. et al., Opt. Express 23, 18288-18299 (2015)