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US 6,611,647 B2Granted
Large effective area optical fiber
AssigneeCorning Incorporated
InventorsGeorge E. Berkey, Daiping Ma, Snigdharaj K. Mishra
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Abstract
An optical waveguide fiber having a relatively large effective area which exhibits low attenuation, low PMD and low microbending sensitivity. A step-index refractive index profile is advantageously used.
Claims67
An optical waveguide fiber comprising:
- a core having a refractive index profile defined by a radius and a relative refractive index percent, wherein the core contains germania, and wherein the core has an alpha less than about 14;
- and
- a clad layer surrounding and in contact with the core and having a refractive index profile defined by a radius and a relative refractive index percent;
- wherein the core and the clad layer provide an effective area greater than about 90 μm2at 1550 nm;
- and
- wherein the fiber contains substantially no fluorine.
3 more elements
An optical waveguide fiber comprising:
- a core having a refractive index profile defined by a radius and a relative refractive index percent with an alpha between about 5 and 14, wherein the core contains germania and wherein the relative refractive index of the core is within the range of about 0.20% to about 0.35% and the radius of the core is within the range of from about 4.0 μm to about 7.0 μm;
- and
- a clad layer surrounding and in contact with the core and having a refractive index profile defined by a radius and a relative refractive index percent;
- wherein the fiber contains substantially no fluorine.
1 more element
An optical waveguide fiber comprising:
- a core having a refractive index profile defined by a radius and a relative refractive index percent, wherein the core contains germania, and wherein the core has an alpha between about 7 and 14;
- and
- a clad layer surrounding and in contact with the core and having a refractive index profile defined by a radius and a relative refractive index percent;
- wherein the core and the clad layer provide an effective area greater than about 90 μm2 at 1550 nm;
- and
- wherein the fiber exhibits a PMD of less than about 0.05 ps/km1/2.
3 more elements
An optical waveguide fiber comprising:
- a core having a refractive index profile defined by a radius and a relative refractive index percent, wherein the core contains germania;
- and
- a clad layer surrounding and in contact with the core and having a refractive index profile defined by a radius and a relative refractive index percent;
- wherein the core and the clad layer provide an effective area greater than about 90 μm2 at 1550 nm;
- and
- wherein the attenuation of the optical fiber at 1383 nm is not more than 0.1 dB/km higher than its attenuation at 1310 nm.
3 more elements
An optical signal transmission system comprising:
- a transmitter;
- a receiver;
- an optical transmission line optically coupled to the transmitter and receiver, wherein the optical transmission line comprises:
- at least one optical fiber section having a core and a clad layer which define a single core segment that provides an effective area greater than about 90 μm2 at 1550 nm, wherein the fiber exhibits an attenuation at 1383 nm which is not more than 0.1 dB/km higher than its attenuation at 1310 nm.
1 more element
Dependencies are inferred from the claim text.