Spatial structures in a laser with field rotation

Ksenia V. Prokofjeva; Victor I. Shmalhausen

doi:10.1117/12.276181

10 June 1997 Spatial structures in a laser with field rotation

Ksenia V. Prokofjeva, Victor I. Shmalhausen

Proceedings Volume 3177, CIS Selected Papers Nonlinear Dynamics of Laser and Optical Systems; (1997) https://doi.org/10.1117/12.276181
Event: Nonlinear Dynamics of Laser and Optical Systems, 1997, Russia, Russian Federation

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.

Citation Download Citation

Ksenia V. Prokofjeva and Victor I. Shmalhausen "Spatial structures in a laser with field rotation", Proc. SPIE 3177, CIS Selected Papers Nonlinear Dynamics of Laser and Optical Systems, (10 June 1997); https://doi.org/10.1117/12.276181

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