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Conference on Lasers and Electro-Optics

Parametric superfluorescence in Na vapour pumped by Bessel beams

Algis S. Piskarskas, A. Stabinis, Virgilijus Vaičaitis

Published Jan 20, 2003• 0 citations
Publisher

Abstract

Summary form only given. The investigations of nonlinear processes in various media pumped by Bessel beams are of broad interest due to the directivity of generated radiation. In this paper we present the results of an experiment, where the essential modification of angular structure of the four-photon parametric superfluorescence is demonstrated in sodium vapour pumped by two Bessel beams of different frequencies.

DOI
10.1109/cleo.1999.834226

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Summary form only given. The investigations of nonlinear processes in various media pumped by Bessel beams are of broad interest due to the directivity of generated radiation. In this paper we present the results of an experiment, where the essential modification of angular structure of the four-photon parametric superfluorescence is demonstrated in sodium vapour pumped by two Bessel beams of different frequencies.
Summary form only given. The picosecond Nd:YAG laser with passive mode-locking and passive negative feedback has been used for the experiments.For the excitation of sodium we have used the second harmonic beam of this laser focused with an axicone (Bessel pump) together with the signal wave of the KH/sub 2/PO/sub 4/ (KDP) optical parametric generator (OPG). When the wavelength of the OPG output beam was about 962 nm, the two-photon resonance 3S-3D of sodium was excited and resulted in four-photon parametric superfluorescence.