In-line polarization-state converter

A method for manufacturing an in-line polarization-state converter, the method comprising:

• radiating a laser beam onto an optical fiber segment to increase a refractive index 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.

A method for manufacturing an in-line polarization-state converter, the method comprising:

• radiating a laser beam onto an optical fiber segment to increase a refractive index of the optical fiber segment;
• enclosing the optical fiber segment in a conductive tube;
• forming an optical fiber ferrule at each end of the optical fiber segment;
• providing a housing enclosing the metal tube, thereby forming an optical fiber package;
• and
• connecting the optical fiber package to one or more optical fiber connector adaptors.

An in-line polarization-state converter, comprising:

• optical fiber connector adaptors fixed to a support panel;
• and
• an optical fiber package connected to the optical fiber connectors, the optical fiber package being configured to be rotated and change a polarization state of light incident thereon, the optical fiber package including an optical fiber segment that has an asymmetric refractive index,
• wherein the optical fiber package is configured to change the polarization state of the incident light using the optical fiber segment.