Hannover 2010 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 6: Ultrashort Laser Pulses: Generation I

Q 6.2: Talk

Monday, March 8, 2010, 14:15–14:30, F 342

Compact laser source for tunable sub 50 fs pulses with 44 MHz repetition rate and several 10 mW of average power in the range of 900 nm to 1300 nm. — •Bernd Metzger, Felix Hoos, Andy Steinmann, and Harald Giessen — 4th Physics Institute, University of Stuttgart, Germany

In the last decades it has become important for research to generate tunable ultrashort laser pulses. We developed a new cost-effective Yb:KGW laser source, which emits laser pulses between 200 fs and 300 fs and, depending on pulse duration, between 4 W and 4.5 W average power at 1025 nm. With this laser source we were able to generate ultrashort white light laser pulses in tapered fibers, which span a spectrum over 1000 nm with average output powers of 2.5 W. These pulses were characterized by XFROG (cross-correlation frequency-resolved optical gating). We compressed different spectral parts of the supercontinuum pulses using a simple SF10 prism sequence. We achieved pulse durations in the range of 25 fs to 50 fs with central wavelengths from 915 nm to 1200 nm and output powers ranging from 17 mW to 175 mW.