| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical fiber having both low macro-bend loss and low micro-bend loss.SOLUTION: A fiber has a first inner cladding region having an outer radius r>8 μm and refractive index Δand a second outer cladding region surrounding the inner cladding region having refractive index Δ, where Δ>Δ>Δ. Difference between Δand Δis greater than 0.01. The fiber exhibits a 22 m cable cutoff of 1260 nm or less, and r/ris 0.25 or more.SELECTED DRAWING: Figure 1 |
