Experimental and theoretical study of higher-order nonlinearities in chalcogenide glasses

We investigate experimentally and theoretically the nonlinear properties of two distinct chalcogenide glasses. Nonlinearities are measured through a spatially resolved Mach–Zehnder interferometer. It is shown that the resulting nonlinear index coefficient cannot be correctly described with the usual...

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Bibliographic Details
Published in:Optics communications 2003-04, Vol.219 (1), p.427-433
Main Authors: Boudebs, G, Cherukulappurath, S, Leblond, H, Troles, J, Smektala, F, Sanchez, F
Format: Article
Language:English
Subjects:
Chalcogenide glasses
Exact sciences and technology
Fourier transform
Fundamental areas of phenomenology (including applications)
Glasses, quartz
Mach–Zehnder interferometer
Nonlinear absorption
Nonlinear optics
Nonlinear refractive index
Optical materials
Optical susceptibility, hyperpolarizability
Optics
Physics
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Summary:We investigate experimentally and theoretically the nonlinear properties of two distinct chalcogenide glasses. Nonlinearities are measured through a spatially resolved Mach–Zehnder interferometer. It is shown that the resulting nonlinear index coefficient cannot be correctly described with the usual cubic model. A more convenient theory is developed assuming a medium with two-photon nonlinear absorption and both cubic ( n 2) and quintic ( n 4) nonlinear index variations. The resulting closed-form expression for the effective nonlinear index coefficient allows to extract the cubic and quintic index coefficients.
ISSN:0030-4018
1873-0310
DOI:10.1016/S0030-4018(03)01341-5