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Theoretical Analysis of Multimodal Four-Wave Mixing in Optical Microwires

Fernandes, G. ; Almeida, A. ; Niehus, M. ; Pinto, A. N.

IEEE/OSA Journal of Lightwave Technology Vol. 31, Nº 2, pp. 195 - 202, January, 2013.

ISSN (print): 0733-8724
ISSN (online): 0733-8724

Journal Impact Factor: 2,567 (in 2015)

Digital Object Identifier: 10.1109/JLT.2012.2224320

Abstract
Optical fiber microwires (OFMs) are nonlinear optical waveguides that support several spatial modes. The multimodal generalized nonlinear Schrödinger equation (MMGNLSE) is deduced taking into account the linear and nonlinear modal coupling. A detailed theoretical description of four-wave mixing (FWM) considering the modal coupling is developed. Both, the intramode and the intermode phase-matching conditions is calculated for an optical microwire in a strong guiding regime. Finally, the FWM dynamics is studied and the amplitude evolution of the pump beams, the signal and the idler are analyzed.