Patent ID: 7066424

Claim:
A spool for winding an optical fiber, comprising: first and second cylindrical barrels for winding the optical fiber thereon, the barrels being axially engaged face-to-face at a juncture; first and second flanges configured for restricting a winding area of the optical fiber by having a disk shape, being disposed to sandwich the barrels and being dimensioned to radially protrude from the barrels, wherein at least one of the flanges contains a through hole and each flange contains a subsidiary barrel at an outer surface; a ultrasonic fusion splicing points formed along said juncture by setting a head of an ultrasonic fusion splicer on one side of first and second cylindrical barrels and by transmitting an ultrasonic wave from the head to the juncture so as to fusion splice the first and second flanges together; and a guide rib formed from the through hole to the subsidiary barrel.