Characteristics Analysis of Photonic Crystal Fiber with Hexagonal and Octagonal Structure

摘要

Aiming at the requirements of high performance of optical communication systems, a new type of photonic crystal fiber (PCF) is proposed. This kind of PCF consists of hexagonal air holes in the inner cladding and octagonal air holes in the others layers. Two big elliptical air holes are embedded to enhance the birefringence. Numeral results show that this kind of PCF exhibits high birefringence with the level of 10‐3 and high nonlinearity with the level of 10‐2m1w‐1. In addition, two zero dispersion points are obtained after optimization, which will find application in dispersion compensation PCFs.