Letters to the editor

Generation of an extended quasirotational spectrum by self-focusing of picosecond pulses in compressed hydrogen

V. B. Morozov, A. N. Olenin, V. G. Tunkin

International Laser Center of Moscow State University

Abstract: Self-focusing of λ = 1.06 μm radiation pulses of 30 ps duration in compressed hydrogen resulted in generation of an extended quasirotational anti-Stokes spectrum consisting of lines with a smooth spatial profile. An increase in the focal length of the lens, which focused the pump radiation in a cell, altered drastically the nature of the output radiation: a set of rings, corresponding to generation of a sequence of vibrational lines, was observed.

PACS: 33.20.Kf, 33.20.Lg, 42.65.Dr, 42.65.Jx

Received: 03.01.1998

 English version: Quantum Electronics, 1998, 28:4, 283–284

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