Patent ID: 7430881

Claim:
A method for producing an optical waveguide attachment device, comprising: inserting a bare end of an optical waveguide into a first end of a capillary tube, wherein a portion of the optical waveguide extends from the first end and a portion of the bare end extends from a second end of the capillary tube; taking a measurement of optical loss through a portion of the optical waveguide at or near a collapsed region to be formed; heating a portion of the capillary tube by exposure to at least two laser beams to collapse the capillary tube onto the optical waveguide to form the collapsed region; terminating both the optical waveguide and the capillary tube within the collapsed region to form an attachment end; and taking a measurement of optical loss through a portion of the optical waveguide inserted into the capillary tube after the heating by utilizing the portion of the bare end extending from the second end of the capillary tube.