Low loss optical fibers with fluorine and chlorine codoped core regions
AssigneeCorning Incorporated
InventorsDana Craig Bookbinder, Ming-Jun Li, Pushkar Tandon
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Abstract
A co-doped optical fiber is provided having an attenuation of less than about 0.17 dB/km at a wavelength of 1550 nm. The fiber includes a core region in the fiber having a graded refractive index profile with an alpha of greater than 5. The fiber also includes a first cladding region in the fiber that surrounds the core region. Further, the core region has a relative refractive index of about −0.10% to about +0.05% compared to pure silica. In addition, the core region includes silica that is co-doped with chlorine at about 1.2% or greater by weight and fluorine between about 0.1% and about 1% by weight.
Claims28
An optical fiber, comprising:
- a fiber having an attenuation of less than about 0.17 dB/km at a wavelength of 1550 nm, the fiber comprising:
- a core region in the fiber having a graded refractive index profile with an alpha of greater than 0.5;
- and
- a first cladding region in the fiber that surrounds the core region,
- wherein the core region comprises silica co-doped with chlorine at about 1.2% or greater by weight and fluorine between about 0.1% and about 1% by weight.
An optical fiber, comprising:
- a fiber having an attenuation of less than about 0.17 dB/km at a wavelength of 1550 nm, the fiber comprising:
- a core region in the fiber having a graded refractive index profile with an alpha of greater than 0.5, the core region further comprises a relative refractive index, Δ1, of about −0.20% to about +0.1% compared to pure silica;
- and
- a first cladding region in the fiber that surrounds the core region,
- wherein the core region comprises silica co-doped with fluorine and chlorine, and
- further wherein the fiber comprises a mode field diameter (MFD) from about 8.2 μm to about 9.5 μm at 1310 nm.
An optical fiber, comprising:
- a fiber having an attenuation of less than about 0.17 dB/km at a wavelength of 1550 nm, the fiber comprising:
- a core region in the fiber having a graded refractive index profile with an alpha of greater than 0.5, the core region further comprises a relative refractive index, Δ1, of about −0.20% to about +0.1% compared to pure silica;
- and
- a first cladding region in the fiber that surrounds the core region,
- wherein the core region comprises silica co-doped with fluorine and chlorine, and
- further wherein the fiber comprises a mode field diameter (MFD) from about 9.0 μm to about 14 μm at 1550 nm.
Dependencies are inferred from the claim text.