| 摘要 |
A holey fiber includes a core portion located at a center of the holey fiber, and a cladding portion located around the core portion, the cladding portion having holes formed in layers around the core portion. The holes are arranged so as to form a triangular lattice while d/Lambda is within a range of 0.33 to 0.43, Lambda is within a range of 10.5 micrometers to 15 micrometers when a hole diameter is d in micrometer and a lattice constant of the triangular lattice is Lambda in micrometer, and in a wavelength of 1550 nanometer, an effective core-area is equal to or greater than 130 mum2, a bending loss in a case of bending the holey fiber at a bend diameter of 20 millimeters is equal to or less than 200 dB/m, and the holey fiber demonstrates a single-mode operation. |
