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 BM., Tonello A., Pagnoux D., Leproux P., Bendahmane A., Dupiol R., Millot G., Wabnitz S.

Autors Affiliation: Univ Limoges, XLIM, UMR CNRS 7252, 123 Ave A Thomas, F-87060 Limoges, France;‎ Univ Bourgogne Franche Comte, ICB UMR CNRS 6303, 9 Ave A Savary, F-21078 Dijon, France;‎ Tanta Univ, Dept Phys, Fac Sci, Tanta 31527, Egypt;‎ Univ Brescia, Dipartimento Ingn Informaz, Via Branze 38, I-25123 Brescia, Italy;‎ Univ Brescia, INO CNR, Via Branze 38, I-25123 Brescia, Italy

Abstract: We experimentally demonstrate that pumping a graded-index 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. (C) 2016 Optical Society of America.

Journal/Review: OPTICS LETTERS

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

KeyWords: INSTABILITY; GENERATION
DOI: 10.1364/OL.41.005785

Citations: 86
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