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Q: Fachverband Quantenoptik und Photonik
Q 53: Ultrashort Laser Pulses I
Q 53.4: Vortrag
Donnerstag, 26. März 2015, 11:45–12:00, K/HS2
High-power ultraviolet to mid-IR multi-color OPCPA system for femtosecond pump-probe experiments — •Matthias Baudisch1, Michael Hemmer1, and Jens Biegert1,2 — 1ICFO-Institut de Ciencies Fotoniques, 08860 Castelldefels, Barcelona, Spain — 2ICREA-Institucio Catalana de Recerca i Estudis Avançats, 08010 Barcelona, Spain
Here we report for the first time on an OPCPA-based high peak-power multi-color radiation-source at 160 kHz repetition-rate with phase-coherent outputs from 400 nm to 3300 nm. Typically, visible to mid-IR multi-color sources are based on cascaded parametric down-conversion schemes driven by amplified Ti:sapphire lasers, resulting in weak outputs in the mid-IR in comparison to the fundamental. In contrast, our approach uses the signal and idler from a high-power mid-IR OPCPA to generate the multiple wavelengths. Using cascaded up-conversion we are able to generate stable femtosecond outputs at 3100 nm, 1600 nm, 800 nm and 400 nm with peak powers of 360 MW, 156 MW, 65 MW and 40 MW at a repetition rate of 160 kHz. All output pulses are intrinsically synchronised, allowing pump-probe experiments with sub-100 fs resolution. These unique operating parameters make this source an enabling tool for novel time-resolved nonlinear spectroscopy experiments in the mid-IR.