Patent ID: 7366387
Filing Date: 2008-04-29
Classification: G02B

Abstract:
1. A single-mode optical fiber, having a prescribed mode field diameter (MFD 1 (μm)) at a first wavelength λ 1 , wherein a bending loss when measured at a second wavelength λ 2 (μm) and wound with a bending radius r (mm) is L b (dB) for one bending, a connector/splice loss with an optical fiber that has a prescribed mode field diameter MFD 2 (μm) at the first wavelength λ 1 is L s (dB) for one connection/splice point at the second wavelength λ 2 (μm), and an mode field diameter dependence of a total loss coefficient L calculated by a formula (1) has a local minimal value in a range of MFD 1 ±0.5 μm, with the formula (1) being as follows: where w s and w b in the formula (1) represent dimensionless weighting factors and are set within a range that satisfies the formulas (2) and (3).