| 摘要 |
A fiber fuse terminator including an optical fiber with a core and cladding having holes, wherein: a refractive index of the core of the optical fiber is higher than a refractive index of a portion of the cladding excepting portions of the holes; wherein: a mode field diameter at a used wavelength of the optical fiber is MFD, and a distance in a cross section perpendicular to the longitudinal direction of the optical fiber between a center of the core and a position, closest to the center of the core, of the hole that is closest to the core is Rmin, is no less than 1.2 and no more than 2.1; a width, in a diameter direction, of a region where the holes present in the cladding is W, is no less than 0.3; and a diameter of the cladding of the optical fiber is Dfiber, W@0.45×Dfiber is satisfied.
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