We propose a very simple method for measuring the zero-dispersion wavelengthof an optical fiber as well as the ratio between the third- and fourth-orderdispersion terms. The method is based on the four wave mixing process whenpumping the fiber in the normal dispersion region, and only requires themeasurement of two spectra, provided that a source tunable near thezero-dispersion wavelength is available. We provide an experimentaldemonstration of the method in a photonic crystal fiber and we show that themeasured zero-dispersion wavelength is in good agreement with a low-coherenceinterferometry measurement.
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