| 摘要 |
PROBLEM TO BE SOLVED: To provide a connection method of optical fiber capable of connecting optical fibers by themselves, in which not only core diameter but also numerical aperture (NA) are different from each other, with a low connection loss. SOLUTION: When connecting the optical fibers 10, 11 by themselves, both connection surfaces 10a, 11a are abutted and thermally welded, wherein the heating of both connection surfaces is performed so as to cause a dopant in the core 12 of the optical fiber 10 of the side having larger NA to diffuse into a clad 13. As the result, the NAs of the both optical fibers 10, 11 can be approximated each other and, therefore, the optical fibers 10, 11 having numerical aperture (NA) different from each other can be connected by themselves with a low connection loss. COPYRIGHT: (C)2007,JPO&INPIT |
