SYSTEMS AND TECHNIQUES FOR TERMINATION OF PORTS IN FIBER LASERS

摘要

A technique is described for eliminating feedback light in a high-power optical device. An optical device is provided that generates, along an optical pathway, an output light at a desired signal wavelength, wherein the generation of the output light at the signal wavelength results in the generation of a feedback light at an undesired feedback wavelength. A port is provided at a selected location along the optical fiber pathway. The port is terminated with a length of a filter fiber, wherein the filter fiber has loss characteristics at the feedback wavelength that result in the elimination of feedback light from the optical fiber pathway through the port.

主权项

1. A method for eliminating feedback light in an optical device, comprising:
(a) providing an optical device for generating, along an optical pathway, an output light at a desired signal wavelength, wherein the generation of the output light at the signal wavelength results in the generation of a feedback light at an undesired feedback wavelength; (b) providing a port at a selected location along the optical fiber pathway; and (c) terminating the port with a length of a filter fiber having an angle-cleaved endface, wherein the filter fiber has loss characteristics at the feedback wavelength that result in the elimination of feedback light from the optical fiber pathway through the port; wherein the filter fiber has loss characteristics at the signal wavelength that result in maintenance of light at the signal wavelength along the optical fiber pathway, and wherein the filter fiber and port have respective cores that are index-matched with respect to each other so as to eliminate Fresnel reflections.