Features of the extreme events observed in the all-solid state laser with a saturable absorber
| Autor: | J. R. Tredicce, Carlos Raúl Bonazzola, Alejandro Andrés Hnilo, Marcelo Gregorio Kovalsky |
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| Rok vydání: | 2015 |
| Předmět: |
SATURABLE ABSORBER
Ciencias Físicas FOS: Physical sciences DYNAMICAL LASER INSTABILITIES law.invention purl.org/becyt/ford/1 [https] Optics law SOLID STATE LASER Óptica Physics business.industry OPTICAL CHAOS Optical rogue waves Saturable absorption purl.org/becyt/ford/1.3 [https] Laser Atomic and Molecular Physics and Optics Computational physics Pulse (physics) Nonlinear system Transverse plane Transversal (combinatorics) Fresnel number business CIENCIAS NATURALES Y EXACTAS Physics - Optics Optics (physics.optics) |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| DOI: | 10.48550/arxiv.1506.02014 |
| Popis: | Extreme events (sometimes also called optical rogue waves), in the form of pulses of extraordinary intensity, are easily observed in its chaotic regime if the Fresnel number of the cavity is high. This result suggests that the nonlinear interaction among transverse modes is an essential ingredient in the formation of extreme events in this type of lasers, but there is no theoretical description of the phenomenon yet. We report here a set of experimental results on the regularities of these extreme events, to provide a basis for the development of such a description. Among these results, we point out here: i) the decay of the correlation across the transversal section of the laser beam, and ii) the appearance of extreme events even if the time elapsed since the previous pulse is relatively short (in terms of the average inter-pulse separation), what indicates the existence of some unknown mechanism of energy storage. We hypothesize that this mechanism is related with the imperfect depletion of the gain by some of the transversal modes. We also present evidence in support of this hypothesis. Comment: 9 pages, 9 figures |
| Databáze: | OpenAIRE |
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