摘要

A novel hole-assistant microstructured optical fiber with a rectangle-like core and four elliptical holes as cladding is proposed. By employing a full-vector finite element method, the modal birefringence and confinement loss are numerically investigated, and the results show that in such a structure, an ultrahigh modal birefringence of 2.91 x 10(-2) and a low confinement loss (< 1 dB/km) can be simultaneously obtained at excited wavelength of 1.55 mu m. It is significant that such a microstructured optical fiber is easily fabricated with its simple structure and exhibits improved performance.