FIBER FOR REDUCED POLARIZATION EFFECTS IN AMPLIFIERS

摘要

A single mode optical fiber (36) suitable for use in an amplified fiber optic sy stem (30) which includes an inner glass core doped with rare earth element and an out er transparent glass cladding. The fiber (36) exhibits a plurality of mode coupling sites formed at regular intervals along the length (L) of the fiber (36) which provide s for a reduced DOP (Degree of Polarization). The sites are formed by a twist at regular intervals along the fiber length (L) by applying a torque to the fiber (36). The method of forming the fiber is also disclosed.