Observation of Geometric Parametric Instability Induced by the Periodic Spatial Self-Imaging of Multimode Waves

Katarzyna Krupa, Alessandro Tonello, Alain Barthélémy, Vincent Couderc, Badr Mohamed Shalaby, Abdelkrim Bendahmane, Guy Millot, and Stefan Wabnitz
Phys. Rev. Lett. 116, 183901 – Published 5 May 2016; Erratum Phys. Rev. Lett. 116, 199902 (2016)
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Abstract

Spatiotemporal mode coupling in highly multimode physical systems permits new routes for exploring complex instabilities and forming coherent wave structures. We present here the first experimental demonstration of multiple geometric parametric instability sidebands, generated in the frequency domain through resonant space-time coupling, owing to the natural periodic spatial self-imaging of a multimode quasi-continuous-wave beam in a standard graded-index multimode fiber. The input beam was launched in the fiber by means of an amplified microchip laser emitting sub-ns pulses at 1064 nm. The experimentally observed frequency spacing among sidebands agrees well with analytical predictions and numerical simulations. The first-order peaks are located at the considerably large detuning of 123.5 THz from the pump. These results open the remarkable possibility to convert a near-infrared laser directly into a broad spectral range spanning visible and infrared wavelengths, by means of a single resonant parametric nonlinear effect occurring in the normal dispersion regime. As further evidence of our strong space-time coupling regime, we observed the striking effect that all of the different sideband peaks were carried by a well-defined and stable bell-shaped spatial profile.

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  • Received 20 January 2016
  • Publisher error corrected 9 May 2016

DOI:https://doi.org/10.1103/PhysRevLett.116.183901

© 2016 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Corrections

9 May 2016

Erratum

Publisher’s Note: Observation of Geometric Parametric Instability Induced by the Periodic Spatial Self-Imaging of Multimode Waves [Phys. Rev. Lett. 116, 183901 (2016)]

Katarzyna Krupa, Alessandro Tonello, Alain Barthélémy, Vincent Couderc, Badr Mohamed Shalaby, Abdelkrim Bendahmane, Guy Millot, and Stefan Wabnitz
Phys. Rev. Lett. 116, 199902 (2016)

Authors & Affiliations

Katarzyna Krupa*, Alessandro Tonello, Alain Barthélémy, and Vincent Couderc

  • Université de Limoges, XLIM, UMR CNRS 7252, 123 Avenue A. Thomas, 87060 Limoges, France

Badr Mohamed Shalaby

  • Physics Department, Faculty of Science, Tanta University, Egypt and Université de Limoges, XLIM, UMR CNRS 7252, 123 Avenue A. Thomas, 87060 Limoges, France

Abdelkrim Bendahmane and Guy Millot

  • Université de Bourgogne Franche-Comté, ICB, UMR CNRS 6303, 9 Av. A. Savary, 21078 Dijon, France

Stefan Wabnitz

  • Dipartimento di Ingegneria dell’Informazione, Università di Brescia, and INO-CNR, via Branze 38, 25123, Brescia, Italy

  • *Corresponding author. krupa.katarzyna@yahoo.com

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Issue

Vol. 116, Iss. 18 — 6 May 2016

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