Department of Electrical Engineering and Electronics, University fo Defense, Kounicova 65, 612 00 Brno, Czech Republic

摘要

Different interferometric methods were used to measure the dispersion characteristics of a holey fiber, in which birefringence is induced by two large holes adjacent to the fiber core. Employing a lateral force method, we measured the spectral dependence of the phase modal birefringence for two lowest-order spatial modes. Using a wavelength scanning method and a technique of spectral-domain tandem interferometry, we measured the spectral dependence of the group modal birefringence for both spatial modes over two different wavelength ranges. The technique of spectral-domain tandem interferometry, which employs a white-light source, a polarizer, a tandem configuration of a Michelson interferometer and the optical fiber, an analyzer and a low-resolution spectrometer, was also used to measure the intermodal group dispersion. Two different group optical path differences between both spatial modes, which were X- or Y-polarized, were measured as a function of wavelength.