Low attenuation optical waveguide
AssigneeCorning Incorporated
InventorsPeter C. Jones, Daiping Ma, David K. Smith
Life of this patent
Estimating the term…
Abstract
Disclosed is a single mode optical waveguide fiber having a core refractive index profile in which the profile parameters are selected to provide an attenuation minimum. A set of profiles having the same general shape and dimensions is shown to have a group of profiles contained in a sub-set which exhibit a minimum of attenuation as compared to the remaining members of the set. The members of the sub-set have been found to have the lowest effective group index, ngeff, and the lowest change in β2 under waveguide fiber bending.
Claims8
A single mode optical waveguide fiber optimized to have low attenuation comprising:
- a core glass region having a refractive index profile;
- an annular clad glass layer surrounding and in contact with the core glass region, the clad glass layer having a refractive index profile, wherein at least a portion of the core index profile is greater than at least a portion of the clad layer index profile;
- wherein, said core region includes,
- a center segment having an outer radius r1, a relative index Δ1%, and a centerline having a relative index,
- a first annular segment, surrounding and in contact with the center segment, having a relative index Δ2 %, and,
- a second annular segment, surrounding and in contact with the first annular segment, having a center radius r3, a relative index Δ3 %, and a width w3;
- wherein,
- Δ1 %>Δ3 %≧Δ2 %≧0;
- and
- Δ1 % is in the range 0.77% to 1.30%, r1 is in the range 2.04 μm to 3.41 μm, Δ2 % is in the range 0 to 0.16%, Δ3 % is in the range 0 to 0.51%, r3 is in the range 5.53 μm to 10.21 μm, and w3 is in the range 0 to 5.76 μm.
A single mode optical waveguide fiber optimized to have low attenuation comprising:
- a core glass region having a refractive index profile;
Dependencies are inferred from the claim text.