Dispersion compensation fiber

摘要

A dispersion compensation fiber comprises a fiber core and cladding. The fiber core is a core layer mainly doped with germanium and having a positive relative refractive index difference. The cladding covering the fiber core comprises a trench cladding mainly doped with fluorine, an annular cladding mainly doped with germanium, a matching cladding mainly doped with fluorine, and an outermost mechanical cladding in order. Relative refractive index differences of the fiber core and the claddings are respectively: Δ1% being 1.55% to 2.20%, Δ2% being −0.55% to −0.30%, Δ3% being 0.40% to 0.65%, Δ4% being −0.20% to −0.01%, and Δ5% being 0. Radius ranges, from R1 to R5, of the fiber core and the claddings are respectively: R1 being 1.4 to 1.7 μm, R2 being 4.1 to 4.8 μm, R3 being 6.7 to 8.8 μm, R4 being 10 to 17 μm, and R5 being 38 to 63 μm.

主权项

1. A dispersion compensation fiber (DCF), comprising:
a fiber core; and claddings surrounding the fiber core, wherein the fiber core comprises a core layer mainly doped with germanium and having a positive relative refractive index difference; wherein the claddings surrounding the fiber core comprise a trench cladding mainly doped with fluorine, an annular cladding mainly doped with germanium, a matching cladding mainly doped with fluorine, and an outermost mechanical cladding disposed from the inner to the outer in sequence; wherein relative refractive index difference ranges of the fiber core and the claddings are respectively: Δ1 % being in a range of 1.55 % to 2.20 %; Δ2 % being in a range of −0.55 % to −0.30 %; Δ3 % being in a range of 0.40 % to 0.65 %; Δ4 % being in a range of −0.20 % to −0.01 %; and Δ5 % being 0; wherein radius ranges, from R1 to R5 , of the fiber core and the claddings are respectively: R1 being in a range of 1.4 to 1.7 μm; R2 being in a range of 4.1 to 4.8 μm; R3 being in a range of 6.7 to 8.8 μm; R4 being in a range of 10 to 17 μm; and R5 being in a range of 38 to 63 μm; and wherein a weight percentage of germanium in the fiber core is in a range of 15 wt % to 35 wt %; a weight percentage of fluorine in the trench cladding is in a range of 1 wt % to 5 wt %; a weight percentage of germanium in the annular cladding is in a range of 4 wt % to 10 wt %; and a weight percentage of fluorine in the matching cladding is in a range of 0.3 wt % to 3 wt %.