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Proceedings Paper

Laser mode competition and stability analysis in intensity-time plane
Author(s): Alina Gearba; Gabriela Cone
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Paper Abstract

It is numerically analyzed the mode competition in a laser with three modes that are oscillating over their threshold, solving the coupled mode equations and following the semiclassical formalism of Lamb. The analysis is started from the stability conditions in different situations of coupling between modes: the weak coupling approximation, the single-mode and two-mode operating and the strong coupling approximation. We plot the trajectories for the coupled oscillators versus time. In our work we assumed homogeneous broadening of the gain medium. This implies that the results apply to a solid-state or a dye laser. For a gas laser, we have to include Doppler broadening and the analysis in this case will be more complicated. The conclusions are that the dynamics of the system can become multistabile and/or unstabile and highly sensitive to the initial conditions and the coupling matrix.

Paper Details

Date Published: 29 June 2001
PDF: 7 pages
Proc. SPIE 4430, ROMOPTO 2000: Sixth Conference on Optics, (29 June 2001); doi: 10.1117/12.432829
Show Author Affiliations
Alina Gearba, Univ. Politehnica Bucharest (Romania)
Gabriela Cone, Univ. Politehnica Bucharest (Romania)

Published in SPIE Proceedings Vol. 4430:
ROMOPTO 2000: Sixth Conference on Optics
Valentin I. Vlad, Editor(s)

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