Abstract

Photonic crystal fibers and Bragg fibers have recently attracted attention because of their interesting spectral and polarization properties, which are promising for photonics devices, e.g., [1, 2]. These structures typically consist of a low-index core with alternating high- and low-index layers. The light is guided in the low-index core through Bragg reflections from the periodic layers, a mechanism different from the total internal reflection. In practice, because of the limited number of layers, these structures support only leaky modes [3]. A theoretical analysis of Bragg fibers has been presented by M. de Sterke et. al. in [4] where it has been noted that TE and TM modes propagate with slightly different losses due to different Fresnel reflection coefficients for the two polarizations. The authors in [1] propose to incorporate Brewster angle in the design conditions in order to enhance the polarization properties of Bragg fibers.

© 2003 Optical Society of America