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Opt Express. 2009 Sep 28;17(20):17950-62. doi: 10.1364/OE.17.017950.

Dispersion-modulation by high material loss in microstructured polymer optical fibers.

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DTU Fotonik, Department of Photonics Engineering, Technical University of Dennmark, ├śrsteds Plads 343, DK-2800 Kgs. Lyngby, Denmark.


The influence of strong loss peaks on the dispersion (through the Kramers-Kronig relations) of a nonlinear waveguide is investigated theoretically. It is found specifically for degenerate four-wave mixing in a poly(methyl methacrylate) microstructured polymer optical fiber that the loss-induced dispersion significantly modifies the wavelengths for which there is phase-match. Depending on the pump wavelength, the waveguide dispersion, and the loss peaks, it is possible for the output spectrum to either be unaffected by the loss-induced dispersion modulation, or to show an increase in the efficiency of nonlinear spectral broadening, compared to the expected efficiency when ignoring the loss-induced dispersion modulation.

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