Method of assembling optical fiber preforms
AssigneeCorning Incorporated
InventorsXiaoming Luo, Chunfeng Zhou
Life of this patent
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Abstract
The present disclosure provides optical fiber preforms formed from core canes having large core-clad ratio, intermediate core-cladding assemblies, and methods for making the preforms and core cladding assemblies. The preforms are made from core canes having a contoured end surface. The contoured end surface(s) include a depression that acts to reduce the stress that develops at the junction of the end surface of the core cane with a soot cladding monolith arising from differences in the coefficient of thermal expansions of the core can and soot cladding monolith. The contoured end surface(s) leads to preforms having low defect concentration and low probability of failure during fiber draw.
Claims19
A core-cladding assembly comprising:
- a porous soot cladding monolith, said porous soot cladding monolith including a first porous cladding glass layer surrounding an internal cavity, said porous soot cladding monolith having a first coefficient of thermal expansion, said internal cavity including a first entrance;
- a consolidated glass body positioned in said internal cavity, said consolidated glass body having a second coefficient of thermal expansion and a first end surface within said internal cavity, said first end surface facing said first entrance and including a first depression.
A method of producing an optical fiber comprising:
- providing a porous soot cladding monolith, said soot cladding monolith including a first porous glass cladding layer and having an internal cavity, said internal cavity including a first entrance;
- and
- inserting a core cane into said internal cavity to form a core-cladding assembly, said core cane including a first end surface, said first end surface including a first depression and facing said first entrance.
Dependencies are inferred from the claim text.