München 2004 – scientific programme

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Q: Quantenoptik und Photonik

Q 42: Ultrakurze Lichtimpulse: Carrier-Envelope-Phase

Q 42.8: Group Report

Thursday, March 25, 2004, 18:15–18:45, HS 223

Phase-locked chirped pulse optical parametric amplification of 12 fs pulses from a Ti:sapphire oscillator — •Jens Biegert, Christoph P. Hauri, Philip Schlup, and Ursula Keller — Physik Department, Swiss Federal Institute of Technology (ETH), Zürich, Switzerland

We present first results of direct chirped pulse optical parametric amplification of 12-fs, 1.7 nJ pulses from a phase-locked Ti:sapphire oscillator. The interaction is modeled with a 3D code and experimental parameters agree well with the simulation. Preliminary experimental results showed amplified spectra spanning a bandwidth of 160 nm with an energy of 85 µJ (0.9 mJ pump at 400 nm), supporting a transform limited pulse duration of 9.8 fs. Compression only led to 28 fs pulses, measured with SPIDER, due to the limited optics bandpass (48 nm, supporting 21 fs) in our setup. Furthermore, we could confirm that the phase-lock of the oscillator pulses is conserved in the amplification process, hence this technique can potentially give access to phase-locked, high-energy few-cycle pulses.