FIBER FOR REDUCED POLARIZATION EFFECTS IN AMPLIFIERS

摘要

A single mode optical fiber (36) suitable for use in an amplified fiber optic system (30) which includes an inner glass core doped with rare earth element and an outer 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 provides 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.