Pattern competition in a high-power CO<sup>2</sup> laser due to optogalvanic      modulation of the pump profile

F. Tito Arecchi; Stefano Boccaletti; Marco Ciofini; Riccardo Meucci

doi:10.1117/12.151552

1 January 1994 Pattern competition in a high-power CO₂ laser due to optogalvanic modulation of the pump profile

F. Tito Arecchi, Stefano Boccaletti, Marco Ciofini, Riccardo Meucci

Author Affiliations +

Optical Engineering, Vol. 33, Issue 1, (January 1994). https://doi.org/10.1117/12.151552

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.

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F. Tito Arecchi, Stefano Boccaletti, Marco Ciofini, and Riccardo Meucci "Pattern competition in a high-power CO₂ laser due to optogalvanic modulation of the pump profile," Optical Engineering 33(1), (1 January 1994). https://doi.org/10.1117/12.151552

Published: 1 January 1994

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