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Optical Engineering

Pattern competition in a high-power CO2 laser due to optogalvanic modulation of the pump profile
Author(s): F. Tito Arecchi; Stefano Boccaletti; Marco Ciofini; Riccardo Meucci
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Paper Abstract

Experimental evidence of periodic alternation of different transverse modes in a high-power CO2 laser is interpreted in terms of local cooling of the discharge column, which corresponds to the maximum emitted intensity. Optogalvanic coupling between emitted intensity and local discharge impedance values yields a transverse redistribution of discharge current and, hence, of laser gain. Thus, besides the fast feedback provided by the cavity, with high-power lasers one must account also for a slow global feedback because of the optogalvanic effects.

Paper Details

Date Published: 1 January 1994
PDF: 5 pages
Opt. Eng. 33(1) doi: 10.1117/12.151552
Published in: Optical Engineering Volume 33, Issue 1
Show Author Affiliations
F. Tito Arecchi, Istituto Nazionale di Ottica (Italy)
Stefano Boccaletti, Istituto Nazionale di Ottica (Italy)
Marco Ciofini, Istituto Nazionale di Ottica (Italy)
Riccardo Meucci, Istituto Nazionale di Ottica (Italy)

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