Control of near-infrared supercontinuum bandwidth by adjusting pump pulse duration

Year: 2012

Authors: Andreana M., Labruyère A., Tonello A., Wabnitz S., Leproux P., Couderc V., Duterte C., Cserteg A., Bertrand A., Hernandez Y., Giannone D., Hilaire S., Huss G.

Autors Affiliation: Université de Limoges, XLIM, UMR CNRS 7252, 123 av. A. Thomas, 87060 Limoges, France; Dipartimento di Ingegneria Dell\’Informazione, Università di Brescia, via Branze 38, 25123 Brescia, Italy; Multitel Asbl, Parc Initialis, 2 rue Pierre et Marie Curie, 7000 Mons, Belgium; Leukos Innovative Optical Systems, Ester Technopole, 1 av. d\’Ester, 87069 Limoges, France

Abstract: We experimentally and numerically investigated the impact of input pump pulse duration on the near-infrared bandwidth of supercontinuum generation in a photonic crystal fiber. We continuously stretched the temporal duration of the input pump laser (centered at 1030 nm) pulses from 500 fs up to 10 ps, while keeping fixed the pump peak power. We observed that the long-wavelength edge of the supercontinuum spectrum is increased by 200 nm as the pump pulse duration grows from 500 fs to 10 ps. We provide a quantitative fit of the experimental results by means of numerical simulations. Moreover, we have explained the observed spectral broadening enhancement induced by pump pulse energy by developing an approximate yet fully analytical model for soliton energy exchange through a series of collisions in the presence of stimulated Raman scattering.

Journal/Review: OPTICS EXPRESS

Volume: 20 (10)      Pages from: 10750  to: 10760

More Information: This work has been carried out in the frame of the European Project NextGenPCF. The authors also acknowledge the partial support from the Universite Franco-Italienne under the program VINCI 2010.
KeyWords: Bandwidth; Computer simulation; Infrared devices; Photonic crystal fibers; Pumps; Solitons; Supercontinuum generation, Energy exchanges; Long wavelength; Near Infrared; Peak power; Pump laser; Pump pulse; Pump pulse energy; Spectral broadening; Supercontinuum; Supercontinuum spectra; Temporal durations, Optical pumping, glass fiber, article; crystallization; equipment design; fiber optics; infrared radiation; laser; methodology; near infrared spectroscopy; photon; radiation scattering; Raman spectrometry; statistical model; time, Crystallization; Equipment Design; Fiber Optic Technology; Infrared Rays; Lasers; Models, Statistical; Optical Fibers; Photons; Scattering, Radiation; Spectroscopy, Near-Infrared; Spectrum Analysis, Raman; Time Factors
DOI: 10.1364/OE.20.010750

Citations: 11
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