Comparison of guided mode dispersion parameters in two different type microstructured optical fibers: asymmetric with displaced core and quasi-ring configuration

This work presents compared results of mode analysis, performed for two recently designed and successfully fabricated silica microstructured optical fibers (MOF). The first one has a typical hexagonal configuration differing by asymmetric due to offset core, displaced in relation to the MOF geometrical center. Configuration of the second MOF provides quasi-ring radial mode field distribution. It imitates ring-core optical fiber properties by special formation of designed 2D-periodic structure. We applied commercially available software COMSOL Multiphysics® 6.1 with rigorous full vectorial finite element method, while earlier on fabricated and presented MOF end-face photo images were applied to get averaged parameters for input data. This work presents comparison results of the mode 1^st and 2^nd order dispersion parameters (mode delay and chromatic dispersion), computed over almost all over ratified “telecommunication” wavelength bands for both two described above MOFs.