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Melnikov L. A., Veshneva I. V., Konjuhov A. I. The numerical simulation of transverse pattern dynamics in a laser. Izvestiya VUZ. Applied Nonlinear Dynamics, 1995, vol. 3, iss. 6, pp. 73-89.

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Russian
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Deterministic Chaos
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Article
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621.373.826

The numerical simulation of transverse pattern dynamics in a laser

Autors: 
Melnikov Leonid Arkadevich, Yuri Gagarin State Technical University of Saratov
Veshneva Irina Vladimirovna, Saratov State University
Konjuhov Andrej Ivanovich, Saratov State University
Abstract: 

The results of numerical modelling of transverse pattern dynamics in a unidirectional ring laser with fast-relaxed active medium of arbitrary optical thickness are presented. The geometry of a cavity containing spherical mirrors and apertures is included in the numerical model. The results presented for the symmetric cavity. Modes with radial index up to 10 and azimuth ones up to 9 are included in the field decomposition. The stationary regimes with deformed modes, the regimes of quasiperiodic oscillations, and locking regimes were observed, in the last ones transverse-mode beat frequency is independent from the gain or mirror optical power variations. The phase singularities (optical vortices) in transverse field pattern and its dynamics are demonstrated.

Key words: 
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Acknowledgments: 
The work was supported by grants № 4000 of the International Science Foundation and ESPRIT CONTRACT P9282-ACTCS, EC-RUSSIA COLLABORATION.
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Received: 
29.05.1995
Accepted: 
30.11.1995
Published: 
21.11.1996
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