For citation:
Prokofjeva K. V., Shmalhausen V. I. Spatial structures in the laser with field rotation. Izvestiya VUZ. Applied Nonlinear Dynamics, 1995, vol. 3, iss. 6, pp. 90-99. DOI: 10.18500/0869-6632-1995-3-6-90-99
Spatial structures in the laser with field rotation
In this work a dynamics of a cylindrically symmetrical unidirectional ring laser with spherical mirrors was investigated. Prism inserted in the cavity is used to rotate electric field to some angle Θ. The value of this angle depends on prism orientation. Angle of rotation has influence on mode frequencies in the empty cavity. Frequency degenerated families in this cavity differ from commonly known ones. At a certam angle of rotation frequency degenerated family consists of infinite number of modes. Spatial structures in this laser will differ from patterns in the laser without field rotation mechanism. We investigate laser dynamics for two medium models: two-level model and model taking into account rotation sublevels of CO2 molecule. The last model leads to appearance in the equations for mode amplitudes an additional dissipative term. In some cases this term can change dynamics of the system. The number of rotational levels takes influence on the speed of relaxation to the steady state. Our results show that one can control a spatial structure formation by means of changing the angle of rotation. The number of rotational sublevels of CO2 molecule has influence on the system dynamics.
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