In this paper, different interferometric techniques were used for measuring dispersion characteristics of specialty optical fibers, including Corning PMF-38 highly birefringent fiber. We measured the wavelength dependence of both the phase and group modal birefringences for two lowest-order linearly polarized (LP) modes. The phase modal birefringence was measured by a lateral force method. The group modal birefringence was measured by a method of spectral-domain tandem interferometry. The latter method was also used to measure the intermodal group dispersion for two orthogonal polarizations of the LP modes. The experiment revealed a distinct dispersion splitting between X-polarized and Y-polarized LP modes.
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