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Turbulence hierarchy in a random fibre laser

Ivan R. Roa Gonzalez, Bismarck C. Lima, Pablo I.R. Pincheira, Arthur A. Brum, Antônio M.S. Macêdo, Giovani L. Vasconcelos, Leonardo de S. Menezes, Ernesto P. Raposo, Anderson S.L. Gomes and Raman Kashyap

Article (2017)

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Cite this document: Roa Gonzalez, I. R., Lima, B. C., Pincheira, P. I.R., Brum, A. A., Macêdo, A. M.S., Vasconcelos, G. L., ... Kashyap, R. (2017). Turbulence hierarchy in a random fibre laser. Nature Communications, 8, p. 1-8. doi:10.1038/ncomms15731
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Abstract

Turbulence is a challenging feature common to a wide range of complex phenomena. Random fibre lasers are a special class of lasers in which the feedback arises from multiple scattering in a one-dimensional disordered cavity-less medium. Here we report on statistical signatures of turbulence in the distribution of intensity fluctuations in a continuous-wave-pumped erbium-based random fibre laser, with random Bragg grating scatterers. The distribution of intensity fluctuations in an extensive data set exhibits three qualitatively distinct behaviours: a Gaussian regime below threshold, a mixture of two distributions with exponentially decaying tails near the threshold and a mixture of distributions with stretched-exponential tails above threshold. All distributions are well described by a hierarchical stochastic model that incorporates Kolmogorov's theory of turbulence, which includes energy cascade and the intermittence phenomenon. Our findings have implications for explaining the remarkably challenging turbulent behaviour in photonics, using a random fibre laser as the experimental platform.

Uncontrolled Keywords

Physics - Optics; Condensed Matter - Statistical Mechanics; Physics - Fluid Dynamics

Open Access document in PolyPublie
Subjects: 2500 Génie électrique et électronique > 2500 Génie électrique et électronique
3100 Physique > 3100 Physique
3100 Physique > 3111 Laser
Department: Département de génie électrique
Département de génie physique
Research Center: Autre
Funders: Conselho Nacional de Desenvolvimento Cientifico e Tecnologico— CNPq, Fundaçao de Amparo a Ciencia e Tecnologia do Estado de Pernambuco— FACEPE, Instituto Nacional de Fotonica—INFo
Date Deposited: 14 Dec 2018 16:06
Last Modified: 15 Dec 2018 01:20
PolyPublie URL: https://publications.polymtl.ca/3536/
Document issued by the official publisher
Journal Title: Nature Communications (vol. 8)
Publisher: Nature Research
Official URL: https://doi.org/10.1038/ncomms15731

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