Patent ID: 7756370

Claim:
A method of producing a ferrule with an optical fiber in which a coated optical fiber is fixedly secured to the ferrule, the method comprising: providing a coated optical fiber, which includes a single-core fiber including a bare optical fiber and a coating, and a reinforcing pipe, wherein, in a state in which a front end of the single-core fiber is passed through an end surface portion of the reinforcing pipe, an adhesive portion is formed by using at least a first adhesive in such a manner that the adhesive portion protrudes and tapers from the end surface portion of the reinforcing pipe toward the front end of the single-core fiber; inserting the coated optical fiber in a ferrule, which is provided with a first tapered hole and a second tapered hole and which includes a ferrule body and a capillary fixedly secured to the ferrule body, until an end surface portion of the coating of the single-core fiber abuts against the first tapered hole and until the end surface portion of the reinforcing pipe abuts against the second tapered hole; and filling a gap between the second tapered hole and the adhesive portion with a second adhesive.