Spatiotemporal characterization of supercontinuum extending from the visible to the mid-infrared in a multimode graded-index optical fiber

Year: 2016

Authors: Krupa K., Louot C., Couderc V., Fabert M., Guenard R., Shalaby B.M., Tonello A., Pagnoux D., Leproux P., Bendahmane A., Dupiol R., Millot G., Wabnitz S.

Autors Affiliation: Université de Limoges, XLIM, UMR CNRS 7252, 123 Avenue A. Thomas, Limoges, 87060, France; Université de Bourgogne Franche-Comté, ICB UMR CNRS 6303, 9 Avenue A. Savary, Dijon, 21078, France; Physics Department, Faculty of Science, Tanta University, Tanta, 31527, Egypt; Dipartimento di Ingegneria dell\’Informazione and INO-CNR, Università di Brescia, via Branze 38, Brescia, 25123, Italy

Abstract: We experimentally demonstrate that pumping a gradedindex multimode fiber with sub-ns pulses from a microchip Nd:YAG laser leads to spectrally flat supercontinuum generation with a uniform bell-shaped spatial beam profile extending from the visible to the mid-infrared at 2500 nm. We study the development of the supercontinuum along the multimode fiber by the cut-back method, which permits us to analyze the competition between the Kerr-induced geometric parametric instability and stimulated Raman scattering. We also performed a spectrally resolved temporal analysis of the supercontinuum emission.

Journal/Review: OPTICS LETTERS

Volume: 41 (24)      Pages from: 5785  to: 5788

KeyWords: Infrared devices; Neodymium lasers; Optical fibers; Optical pumping; Pumping (laser); Supercontinuum generation, Graded-Index Multimode fibers; Graded-index optical fibers; Parametric instabilities; Spatial beam profiles; Spatiotemporal characterization; Super continuum; Supercontinuum emissions; Temporal analysis, Multimode fibers
DOI: 10.1364/OL.41.005785

Citations: 106
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