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Experimental and theoretical analysis of dispersion characteristics of two-mode birefringent holey fiber

We present the results of experimental and theoretical analysis of dispersion characteristics of a two-mode birefringent holey fiber, in which the birefringence is induced by two large holes adjacent to the fiber core. Different interferometric techniques were used to measure in a broad spectral range the wavelength dependences of the phase and the group modal birefringence for the fundamental and the higher-order linearly polarized (LP) spatial modes. We also measured the wavelength dependence of the intermodal dispersion for two orthogonal polarizations of the fundamental and the higher-order LP spatial modes employing a white-light spectral interferometric method. Furthermore, we calculated all the dispersion characteristics using a full-vector finite-element method and confirmed good agreement between experimental and theoretical results.