Patent ID: 6431767
Filing Date: 2002-08-13
Classification: G02B

Abstract:
A method for producing a coupler based on fiber-fused connection comprising the steps of:placing a plurality of optical fiber cords in parallel each of which comprises an optical fiber core line with resilient fibers disposed around a periphery thereof, being collectively covered with a jacket; cutting a specified point of the jacket of each optical fiber core line to divide the jacket into two limbs; sliding the divided limbs of each jacket in opposite directions to expose thereby a section of the underlying optical fiber core line, the exposed sections of the optical fibers being brought into contact with each other, and the contacted sections being heated to melt to form thereby a fusion-connected section; sliding back each jacket limb close to the fusion-connected section; and placing the fusion-connected section together with the inward ends of the jacket limbs in a protective case, a hardening resin being introduced into a cavity within the protective case to fill the cavity, and the resin being hardened thereby to position the optical fiber cords within the protective case.