Patent ID: 7844151

Claim:
A method for manufacturing an in-line polarization-state converter, the method comprising: radiating a laser beam onto a first side of an optical fiber segment to increase a refractive index of the first side of the optical fiber segment; enclosing the optical fiber segment with a metal tube; forming optical fiber ferrules at both ends of the optical fiber segment, and providing a housing on the outside of the metal tube, thereby forming an optical fiber package; and connecting the optical fiber package to optical fiber connector adaptors, wherein the refractive index of the first side of the optical fiber segment is larger than a refractive index of a second side of the optical fiber segment, thereby the refractive index of the optical fiber segment asymmetrically increased, wherein the housing has a lower housing and an upper housing, wherein a first protruding portion of the lower housing is coupled with a first groove provided in each of the optical fiber ferrules, and a second protruding portion of the lower housing is coupled with a second grove provided in each of the optical fiber ferrules.