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Proceedings Paper

Generation of femtosecond pulse sequences in the ultraviolet by spectral phase modulation
Author(s): Patrick Nuernberger; Gerhard Vogt; Reimer Selle; Susanne Fechner; Tobias Brixner; Gustav Gerber
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Paper Abstract

We employ a 128-pixel liquid-crystal spatial light modulator to generate variable pulse sequences from a titanium-sapphire femtosecond laser amplifier system centered at 800 nm. By applying phase modulations based on triangular-shaped spectral phase patterns, pulse sequences can be generated whose overall spectrum is still conserved but whose subpulses differ in their spectral composition. We further use nonlinear crystals to analyze the shape of these pulses after frequency conversion. Our experiments show that it is possible to transfer these pulse sequences into the ultraviolet at central wavelengths of 400 nm and 267 nm without losing the ability to spectrally distinguish between the femtosecond subpulses. This is affirmed by measurements using cross-correlation and XFROG (cross-correlation frequency resolved optical gating) techniques with an unmodulated laser pulse. Simulations of the experiments are performed for comparison. We also discuss promising applications in spectroscopy or information encoding.

Paper Details

Date Published: 25 April 2006
PDF: 12 pages
Proc. SPIE 6187, Photon Management II, 61870M (25 April 2006); doi: 10.1117/12.671819
Show Author Affiliations
Patrick Nuernberger, Univ. Würzburg (Germany)
Gerhard Vogt, Univ. Würzburg (Germany)
Reimer Selle, Univ. Würzburg (Germany)
Susanne Fechner, Univ. Würzburg (Germany)
Tobias Brixner, Univ. Würzburg (Germany)
Gustav Gerber, Univ. Würzburg (Germany)

Published in SPIE Proceedings Vol. 6187:
Photon Management II
John T. Sheridan; Frank Wyrowski, Editor(s)

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