Dispersion-shifted optical fiber
AssigneeSumitomo Electric Industries, Ltd.
InventorsTakatoshi Kato, Eisuke Sasaoka, Masayuki Nishimura
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Abstract
The present invention relates to a dispersion-shifted optical fiber suitable for an optical transmission line having an optical fiber amplifier with a wider amplification band. In particular, the dispersion-shifted optical fiber according to the present invention has a zero-dispersion wavelength of 1610 nm or more but 1750 nm or less, and a cutoff wavelength of 1.1 μm or more at a length of 2 m in order to suppress the bending loss to a practically permissible range, and has, with respect to light having a wavelength of 1550 nm, an effective area of 45 μm2 or more and a dispersion slope of 0.15 ps/nm2/km or less in order to suppress the occurrence of nonlinear phenomena.
Claims11
A dispersion-shifted optical fiber comprising a core region extending along a predetermined axis and a cladding region provided on the outer periphery of said core region and having a zero-dispersion wavelength of 1610 nm or more but 1670 nm or less;
- said dispersion-shifted optical fiber having:
- an effective area of 50 μm2 or more with respect to light having a wavelength of 1550 nm;
- and
- a dispersion slope of 0.15 ps/nm2/km or less with respect with light having a wavelength of 1550 nm.
A WDM transmission system including a dispersion-shifted optical fiber through which signals having a plurality of wavelengths within a range of 1530 nm or more but 1610 nm or less propagate,
- wherein said dispersion-shifted optical fiber comprises:
- a core region extending along a predetermined axis;
- and
- a cladding region provided on the outer periphery of said core region, and
- wherein said dispersion-shifted optical fiber has:
- a zero-dispersion wavelength of 1610 nm or more but 1670 nm or less;
- a cutoff wavelength of 1.1 μm or more at a length of 2 m;
- an effective area of 50 μm2 or more with respect to light having a wavelength of 1550 nm;
- and
- a dispersion slope of 0.15 ps/nm2/km or less with respect to light having a wavelength of 1550 nm.
A WDM transmission system including a dispersion-shifted optical fiber through which signals having a plurality of wavelengths within a range of 1530 nm or more but 1610 nm or less propagate,
- wherein said dispersion-shifted optical fiber comprises:
- a core region extending along a predetermined axis;
- and
- a cladding region provided on the outer periphery of said core region, and
- wherein said dispersion-shifted optical fiber has:
- a zero-dispersion wavelength of 1640 nm or more but 1750 nm or less;
- a cutoff wavelength of 1.1 μm or more at a length of 2 m;
- an effective area of 45 μm2 or more with respect to light having a wavelength of 1550 nm;
- and
- a dispersion slope of 0.15 ps/nn2/km or less with respect to light having a wavelength of 1550 nm.
A WDM transmission system including a dispersion-shifted optical fiber through which signals having a plurality of wavelengths within a range of 1530 nm or more but 1610 nm or less propagate,
- wherein said dispersion-shifted optical fiber comprises:
- a core region extending along a predetermined axis;
- and
- a cladding region provided on the outer periphery of said core region, and
- wherein said dispersion-shifted optical fiber has:
- a zero-dispersion wavelength of 1610 nm or more but 1750 nm or less;
- a cutoff wavelength of 1.1 μm or more at a length of 2 m;
- an effective area of 45 μm2 or more with respect to light having a wavelength of 1550 nm;
- and
- a dispersion slope of 0.06 ps/nm2/km or more but 0.15 ps/nm2/km or less with respect to light having a wavelength of 1550 nm.
Dependencies are inferred from the claim text.