Journal of the European Optical Society - Rapid publications, Vol 7 (2012)

Spectral interferometry-based chromatic dispersion measurement of fibre including the zero-dispersion wavelength

P. Hlubina, M. Kadulov√°, D. Ciprian


We report on a simple spectral interferometric technique for chromatic dispersion measurement of a short length optical fibre including the zero-dispersion wavelength. The method utilizes a supercontinuum source, a dispersion balanced Mach-Zehnder interferometer and a fibre under test of known length inserted in one of the interferometer arms and the other arm with adjustable path length. The method is based on resolving one spectral interferogram (spectral fringes) by a low-resolution NIR spectrometer. The fringe order versus the precise wavelength position of the interference extreme in the recorded spectral signal is fitted to the approximate function from which the chromatic dispersion is obtained. We verify the applicability of the method by measuring the chromatic dispersion of two polarization modes in a birefringent holey fibre. The measurement results are compared with those obtained by a broad spectral range (500-1600 nm) measurement method, and good agreement is confirmed.

© The Authors. All rights reserved. [DOI: 10.2971/jeos.2012.12017]

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