Measurement of the temporal coherence of ultrashort harmonic pulses: Towards coherent spectroscopy in the extreme ultraviolet

Year: 1997

Authors: Bellini M., Hänsch T.W.

Autors Affiliation: European Laboratory for Non-Linear Spectroscopy (LENS), University of Florence, Istituto Nazionale di Fisica della Materia (INFM), L.go E. Fermi, 2, I-50125 Firenze, Italy; Max-Planck-Institut für Quantenoptik, D-85748 Garching, Germany

Abstract: We propose a novel experimental method for measuring the degree of temporal coherence of ultrashort pulses of harmonics generated by focusing intense laser pulses in a gas jet. The method is demonstrated in a simple configuration with the third harmonic generated in air from a 120-fs long infrared (800-nm) pulse, but the approach can be readily extended to the characterization of higher-order harmonics. We propose the use of a modified version of the experimental apparatus to perform high-resolution Ramsey-type coherent spectroscopy in the VUV and XUV.

Journal/Review: APPLIED PHYSICS B-LASERS AND OPTICS

Volume: 65 (4-5)      Pages from: 677  to: 680

KeyWords: Harmonic generation; Ultraviolet spectroscopy, Ultrashort harmonic pulses, Laser pulses
DOI: 10.1007/s003400050332

Citations: 7
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