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Proceedings Paper

Effects of light feedback on CO2 laser instabilities
Author(s): Li-gen Zhang
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Paper Abstract

Up till now, the effects of transverse distribution of light field and atomic polarization on laser instabilities and chaos have not been considered in most of experimental studies, and the plane-wave model has been widely adopted in theoretical analysis. However, plane-wave model fails to predict some observed results. It is come to be shown that the plane-wave Maxwell-Block theory is only an approximate description on dynamic behavior of laser system, and some important factors have been neglected. More recently, Lippi et al. 1 took the transverse distribution of cavity mode into consideration and made a research on the effects of Gaussion distribution. Gao Jinyue et al. 2 made a theoretical calculation on a simplified model in which the light field is axix-symmetric and changes only along radial direction. In this paper we report the first observation of the pulsation frequency shift and the chaos operation caused by light feedback, which changes the transverse distribution of light field, in a single-longitudinal, multitransverse mode CO2 laser. The result shows that the transverse distribution of light field and population inversion is an important factor to affect laser stability.

Paper Details

Date Published: 1 July 1990
PDF: 3 pages
Proc. SPIE 1230, International Conference on Optoelectronic Science and Engineering '90, 123052 (1 July 1990); doi: 10.1117/12.2294819
Show Author Affiliations
Li-gen Zhang, Nankai Univ. (China)

Published in SPIE Proceedings Vol. 1230:
International Conference on Optoelectronic Science and Engineering '90
DaHeng Wang, Editor(s)

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