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Observation of modulational instability induced by velocity-matched cross-phase modulation in a normally dispersive
G Millot1, S Pitois, P T Dinda
1Laboratoire de Physique, Université de Bourgogne, 9 Avenue A. Savary, B.P. 400, 21011 Dijon, France.
Abstract:
We demonstrate experimentally the existence of cross-phase-modulation-induced modulational instability in the absence of group-velocity mismatch between the interacting nonlinear dispersive waves. The experiment is performed by means of a normally dispersive isotropic bimodal fiber. The group-velocity mismatch between the fundamental and the first-order modes that constitute the two interacting waves is controlled by wavelength tuning. A strong power dependence of the modulational instability spectra is observed near the condition of group-velocity matching.
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