Optimum Structure Design for Hollow Bragg Fiber

A new unequal-period radial hollow Bragg fiber structure has been optimum designed to improve the guided flux transmit characteristics. The core of this Bragg fiber is composed of air, and the cladding is formed by a set of alternating layers of up-doped and down-doped silica. The number of the cladding medium layers can be reduced greatly, and some simulation results have been obtained. The simplification of the cladding layers is useful for the fabrication of Bragg fiber.