Large-effective-mode-area low-loss optical fiber with optimized cladding components
AssigneeJiangsu Etern Optical Fiber Technology Co., Ltd.
InventorsLongfei Wang, Fan Li, Lihong Sui
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Abstract
The present invention provides a large-effective-mode-area low-loss optical fiber with optimized cladding components, which comprises a core layer and a cladding comprising, from the inside to the outside, a first sinking layer, a second sinking layer, an optional third sinking layer, and an outer cladding. In the present invention, phosphorus and aluminum are co-doped in the optical fiber cladding, to form a tetrahedron [AlPO4] in glass, thus optimizing the viscosity of the cladding while effectively reducing the refractive index of the cladding, without causing increased hydrogen loss. The process is simple, and highly repeatable.
Claims10
A large-effective-mode-area low-loss optical fiber with optimized cladding components, comprising a core layer and a cladding comprising, from inside to outside, a first sinking layer, a second sinking layer and an outer cladding, wherein
- the second sinking layer is a multi-doped quartz inner cladding, and dopants comprise fluorine, aluminum and phosphorus, wherein aluminum and phosphorus are doped in an amount of 0-10 mol %, and have a continuous distribution, the molar ratio of aluminum and phosphorus is 0.7-1.3:1, aluminum and phosphorus are co-doped in glass to form a [AlPO4] tetrahedron, the contribution of the [AlPO4] tetrahedron to the refractive index of the second sinking layer is −0.8%-0, the contribution of fluorine to the refractive index of the second sinking layer is −0.05%-0, the relative difference Δn2 in refractive index of the second sinking layer is −0.85%-0, and the radius R2 of the second sinking layer is 8-35 μm.
Dependencies are inferred from the claim text.