High dispersion zero waveguide fiber
AssigneeCorning Incorporated
InventorDavid K. Smith
Life of this patent
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Abstract
Disclosed is a single mode optical waveguide fiber designed for use in high performance telecommunication systems. The novel core profile design improves bending performance to provide enhanced resistance to adverse environments. Total dispersion over an extended wavelength window is maintained low by placing the zero dispersion wavelength above the upper limit of the operating window. In addition, cut off wavelength is increased to just below the operating window. Ease of manufacture is retained as is very low waveguide attenuation.
Claims5
A single mode optical waveguide fiber designed for high data rate WDM telecommunications systems comprising:
- a core region comprising,
- a central region, having a radius r0, an index profile and a relative index of refraction Δ0%,
- a first annular region, abutting said central region, having an index profile and a maximum index of refraction Δ1%, and,
- a second annular region, abutting said first annular region, having a radius r2, a width w2, an index profile and a maximum index of refraction Δ2%,
- wherein, Δ0≧Δ2>Δ1;
- and,
- a clad layer, surrounding said core region, having a substantially constant index of refraction nc, wherein the maximum refractive index of the first annular region, n1, is such that n1≧nc;
- and,
- wherein, Δ0% is in the range of about 0.79% to 1.21% and r0 is in the range of about 2.55 μm to 3.55 μm, Δ1% is no greater than about 0.2%, and Δ2% is in the range of about 0.3% to 1.2%, r2 is in the range of about 5.50 μm to 8.70 μm, w2 is in the range of about 0.4 μm to 2 μm, and the inner volume is in the range of about 2.9 units to 3.9 units and the outer volume is in the range having a lower limit greater than 7.2 units, an upper limit less than or equal to 10.2 units and a ratio of outer to inner volume in the range 1.96 to 3.04 units.
Dependencies are inferred from the claim text.