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This article is cited in 8 scientific papers (total in 8 papers)
Resonators. Modes
Influence of the resonator parameters and spatially nonuniform amplification on the spatial structure of the fundamental mode of stable resonator lasers
M. V. Gorbunkova, P. V. Kostryukovbc, V. G. Tunkinbc a P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow
b Lomonosov Moscow State University, Faculty of Physics
c International Laser Center of Moscow State University
Abstract:
The combined influence of the resonator parameters and spatially nonuniform axially symmetric amplification distribution in a four-level active medium on the spatial structure of the fundamental mode of laser radiation is studied numerically by the Fox–Li method. The model of two beams interacting due to the spatial amplification nonuniformity is used to obtain simple analytic estimates. The transition of the spatial structure of the fundamental mode from the Gaussian one to the structure formed by a set of Laguerre–Gaussian beams is studied. It is shown that near the degenerate configurations of the resonator a decrease in the diameter of the pump beam leads to an increase in the number of
Laguerre–Gaussian beams forming the fundamental mode. It is found that the range of detunings from the strong degeneracy within which substantial differences of the spatial structure of the fundamental mode from the Gaussian structure are realised, increases with increasing the gain.
Received: 06.11.2007 Revised: 05.02.2008
Citation:
M. V. Gorbunkov, P. V. Kostryukov, V. G. Tunkin, “Influence of the resonator parameters and spatially nonuniform amplification on the spatial structure of the fundamental mode of stable resonator lasers”, Kvantovaya Elektronika, 38:7 (2008), 689–694 [Quantum Electron., 38:7 (2008), 689–694]
Linking options:
https://www.mathnet.ru/eng/qe13754 https://www.mathnet.ru/eng/qe/v38/i7/p689
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