Observation of modulational instability induced by velocity-matched cross-phase modulation in a normally dispersive bimodal fiber.
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.
Millot
G
G
Laboratoire de Physique, Université de Bourgogne, 9 Avenue A. Savary, B.P. 400, 21011 Dijon, France.
Pitois
S
S
Dinda
P T
PT
Haelterman
M
M