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Proceedings Paper

Frequency conversion from near-infrared to mid-infrared in highly nonlinear optical fibres
Author(s): Nicolas Ducros; Franck Morin; Kevin Cook; Alexis Labruyère; Sébastien Février; Georges Humbert; Fréderic Druon; Marc Hanna; Patrick Georges; J. Canning; Ryszard Buczynski; Dariusz Pysz; Ryszard Stepien
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Paper Abstract

Chalcogenide or heavy metal oxide glasses are well known for their good transparency in the mid-infrared (MIR) domain as well as their high nonlinear refractive index (n2) tens to hundreds times higher than that of silica. We have investigated the nonlinear frequency conversion processes, based upon either stimulated Raman scattering (SRS) or soliton fission and soliton self-frequency shift (SSFS) in fibres made up with such highly nonlinear infrared transmitting glasses. First, SRS has been investigated in a chalcogenide As2S3 step index fibre. In the single pass configuration, under quasi continuous wave 1550 nm pumping, Raman cascade up to the forth Stokes order has been obtained in a 3 m long piece of fibre. The possibility to build a Raman laser thanks to in-fibre written Bragg gratings has also been investigated. A 5 dB Bragg grating has been written successfully in the core. Then, nonlinear frequency conversion in ultra-short pulse regime has been studied in a heavy metal oxide (lead-bismuth-gallium ternary system) glass photonic crystal fibre. Broadband radiation, from 800 nm up to 2.8 μm, has been obtained by pumping an 8 cm long piece of fibre at 1600 nm in sub-picosecond pulsed regime. The nonlinear frequency conversion process was assessed by numerical modelling taking into account the actual fibre cross-section as well as the measured linear and nonlinear parameters and was found to be due to soliton fission and Raman-induced SSFS.

Paper Details

Date Published: 14 May 2010
PDF: 8 pages
Proc. SPIE 7714, Photonic Crystal Fibers IV, 77140B (14 May 2010); doi: 10.1117/12.854379
Show Author Affiliations
Nicolas Ducros, XLIM, CNRS and Univ. de Limoges (France)
Franck Morin, Lab. Charles Fabry de l'Institut d'Optique, Univ. Paris-Sud (France)
Kevin Cook, The Univ. of Sydney (Australia)
Alexis Labruyère, XLIM, CNRS and Univ. de Limoges (France)
Sébastien Février, XLIM, CNRS and Univ. de Limoges (France)
Georges Humbert, XLIM, CNRS and Univ. de Limoges (France)
Fréderic Druon, Lab. Charles Fabry de l'Institut d'Optique, Univ. Paris-Sud (France)
Marc Hanna, Lab. Charles Fabry de l'Institut d'Optique, Univ. Paris-Sud (France)
Patrick Georges, Lab. Charles Fabry de l'Institut d'Optique, Univ. Paris-Sud (France)
J. Canning, The Univ. of Sydney (Australia)
Ryszard Buczynski, Univ. of Warsaw (Poland)
Dariusz Pysz, Institute of Electronic Materials Technology (Poland)
Ryszard Stepien, Institute of Electronic Materials Technology (Poland)


Published in SPIE Proceedings Vol. 7714:
Photonic Crystal Fibers IV
Kyriacos Kalli; Waclaw Urbanczyk, Editor(s)

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