Fiber Optics and Optical Communication

Highly nonlinear As2Se3-based chalcogenide photonic crystal fiber for midinfrared supercontinuum generation

[+] Author Affiliations
Rim Cherif, Amine Ben Salem, Mourad Zghal

University of 7th November at Carthage, Engineering School of Communication of Tunis (Sup’Com), Cirta’Com laboratory, Technopark El Ghazala, 2088, Ariana, Tunisia

Pascal Besnard

ENSSAT-FOTON/CNRS UMR, 6082 6 rue de Kerampont, BP 80518, 22305 Lannion Cedex, France

Thierry Chartier

Université Européenne de Bretagne, France, CNRS, UMR 6082 Foton, Enssat, BP 80518, 22305 Lannion Cedex, France

Laurent Brilland

PERFOS, 11 rue Louis de Broglie, 22305 Lannion Cedex, France

Johann Troles

Université Européenne de Bretagne, France, CNRS, UMR 6226, Sciences Chimiques de Rennes, Équipe Verres et Céramiques, Campus Beaulieu, 35042 Rennes Cedex, France

Opt. Eng. 49(9), 095002 (September 21, 2010). doi:10.1117/1.3488042
History: Received March 27, 2010; Revised July 21, 2010; Accepted July 26, 2010; Published September 21, 2010; Online September 21, 2010
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We propose a real, highly nonlinear, As2Se3-based chalcogenide photonic crystal fiber in which a supercontinuum (SC) spanning more than 2 octaves is generated at λ=2.8μm in the femtosecond regime. The designed PCF is characterized for ultrabroadband mid-infrared SC generation in only few millimetres of fiber length. A full modal analysis of the optical properties of the fiber is presented in terms of the effective area, the nonlinearity coefficient, and the chromatic dispersion. A second-order Sellmeier approximation is proposed to estimate the variation of the refractive index of the As2Se3 material as a function of wavelength. The numerical study shows that a SC spanning from 1.9to4μm can be generated in the chalcogenide PCF with an air-hole diameter of 1.26μm and a pitch of 1.77μm. We examine the interplay of the nonlinear effects that lead to the construction of the SC as a function of the input power and the fiber length. We find that the dynamics behind the SC generation is mainly ruled by the effects of self phase modulation and stimulated Raman scattering. The intrinsic properties of the chalcogenide glasses and the microstructure provide enhanced optical properties and offer numerous applications in the infrared field.

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© 2010 Society of Photo-Optical Instrumentation Engineers

Citation

Rim Cherif ; Amine Ben Salem ; Mourad Zghal ; Pascal Besnard ; Thierry Chartier, et al.
"Highly nonlinear As2Se3-based chalcogenide photonic crystal fiber for midinfrared supercontinuum generation", Opt. Eng. 49(9), 095002 (September 21, 2010). ; http://dx.doi.org/10.1117/1.3488042


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