Abstract
Supercontinuum generation results from the spectral broadening of an intense light arising from the interplay between several nonlinear optical effects. In this paper, a non-destructive optical time-domain reflectometry set-up is proposed to measure the spatial evolution of the spectral broadening induced along an optical fiber. The method is based on the measurement of the Rayleigh backscattered signals generated by the various components of the spectral broadening. The system was experimentally tested on conventional and highly nonlinear fibers. The experimental data obtained with the proposed method were in good agreement with the optical spectra measured by an optical spectrum analyzer at the fiber outputs. The proposed measurement method can be applied without damaging and/or perturbing the intrinsic dynamics of the supercontinuum generation.
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