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Proceedings Paper

Spatial structures in a laser with field rotation
Author(s): Ksenia V. Prokofjeva; Victor I. Shmalhausen
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Paper Abstract

In the work the spatial dynamics of a cylindrically symmetrical unidirectional ring laser with spherical mirrors is investigated. A prism inserted in the cavity is used to rotate the electric field by an angle (theta) . The value of the angle depends on prism orientation. The angle of rotation affects the mode frequencies in the empty cavity. The frequency-degenerate sets of modes in this cavity differ from the commonly known ones. For example, at a certain angle of rotation the frequency-degenerate set consists of the infinite number of modes. The spatial structures in the laser differ from the patterns in a laser without field rotation. We investigate laser dynamics for two models of the active medium: the two-level model and the model allowing for the rotational sublevels of the CO2 molecule. The latter model leads to appearance of an additional dissipative term in the equations for the mode amplitudes. In some cases this term can change the system dynamics. The number of rotational levels influences on the rate with which the system relaxes to the steady state. Our results show that one can control the spatial structure formation by changing the angle of field rotation. The number of the rotational sublevels of the CO2 molecule influences on the system dynamics.

Paper Details

Date Published: 10 June 1997
PDF: 8 pages
Proc. SPIE 3177, CIS Selected Papers Nonlinear Dynamics of Laser and Optical Systems, (10 June 1997); doi: 10.1117/12.276181
Show Author Affiliations
Ksenia V. Prokofjeva, Moscow State Univ. (Russia)
Victor I. Shmalhausen, Moscow State Univ. (Russia)

Published in SPIE Proceedings Vol. 3177:
CIS Selected Papers Nonlinear Dynamics of Laser and Optical Systems
Valery V. Tuchin, Editor(s)

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