White-light supercontinuum generation in normally dispersive optical fiber using original multi-wavelength pumping system

Pierre-Alain Champert (1) , Vincent Couderc (1) , Philippe Leproux (1) , Sébastien Février (1) , Laurent Labonté (2) , Vincent Tombelaine (1) , Philippe Roy (1) , Claude Froehly (1) , Philippe Nerin (3)

1 IRCOM - Institut de Recherche en Communications Optiques et Microondes
2 LPMC - Laboratoire de physique de la matière condensée
3 HORIBA ABX SAS - HORIBA Medical

We report on the experimental demonstration of a white-light supercontinuum generation in normally dispersive singlemode air-silica microstructured fiber. We demonstrate that the simultaneous excitation of the microstuctured fiber in its normal and anomalous dispersion regimes using the fundamental and second harmonic signals of a passively Q-switched microchip laser leads to a homogeneous supercontinuum in the visible range. This pumping scheme allows the suppression of the cascaded Raman effect predominance in favor of an efficient spectrum broadening induced by parametric phenomena. A flat supercontinuum extended from 400 to 700 nm is achieved.

Mots clés: Nonlinear optics; Diagnostic applications of nonlinear optics

Domaines: Optique [physics.optics]

Pierre-Alain Champert, Vincent Couderc, Philippe Leproux, Sébastien Février, Laurent Labonté, et al.. White-light supercontinuum generation in normally dispersive optical fiber using original multi-wavelength pumping system. Optics Express, 2004, 12 (19), pp. 4366-4371. ⟨10.1364/OPEX.12.004366⟩. ⟨hal-01657818⟩