Achromatic second harmonic generation: Tunable ultraviolet pulses with sub-10 fs duration

Baum, P.; Lochbrunner, Stefan und Riedle, Eberhard (2004): Achromatic second harmonic generation: Tunable ultraviolet pulses with sub-10 fs duration. 14th International Conference on Ultrafast Phenomena, 25. – 30. Juli 2004, Niigata Japan. Kobayashi, T.; Okada, Tadashi und Nelson, Keith A. (Hrsg.): Bd. 79 Optical Society of America. S. 79-81

Abstract

Tunable ultraviolet (UV) pulses shorter than 10 fs are generated by achromatic frequency doubling the output of a noncollinear optical parametric amplifier. We achieve first and second order achromatic phase matching with a suitable two-prism sequence and thereby increase the natural bandwidth of the nonlinear crystal by a factor of 80. Extremely broad UV spectra with a Fourier limit of 2.9 fs are generated in a 360 mu m thick BBO crystal at a conversion efficiency of 20 %, The angular dispersion and the first order chirp of the highly stable UV pulses is compensated with a second prism sequence. By controlling the higher order chirp with a deformable mirror we generate pulses as short as 7.1 fs.

• Dokumententyp: Konferenzbeitrag (Paper)
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 0172-6218
• Sprache: Englisch