Loading patent…
AssigneeYangtze Optical Fibre and Cable Joint Stock Limited Company
InventorsYucheng Yang, Beibei Cao, Xinben Zhang, Hongqi Huang, Peng Wang, Tianyong Yue
Estimating the term…
A rare earth-doped double-clad optical fiber includes a rare earth ion-doped fiber core, an inner cladding layer, and an outer cladding layer. A cross section of the inner cladding layer is a non-circular plane including at least two arcuate notches. According to the provided optical fiber, optical processing can be performed on a preform without changing a preform preparation process and a drawing process. The inner cladding is designed to have a non-circular planar structure having a cross section with at least two arcuate notches. While maintaining the same light absorption efficiency of pump light within the cladding layer, a preform polishing process is simplified, a risk of cracking the preform during polishing of multiple surfaces and a risk of contamination of the preform caused by impurities are reduced, wire drawing control precision is better, and comprehensive performance of the optical fiber is improved.
A rare earth-doped double-clad optical fiber, comprising a rare earth ion-doped fiber core, an inner cladding layer, and an outer cladding layer, wherein a cross section of the inner cladding layer is a non-circular plane comprising at least two arcuate notches, wherein the cross section of the inner cladding layer is a non-circular plane comprising four identical arcuate notches, wherein the at least two arcuate notches are not connected with one another, wherein the four identical arcuate notches are symmetrically distributed on the non-circular plane, and wherein a ratio between a height of the arcuate notches and a circle diameter of the inner cladding layer is in a range from 0.01 to 0.05.
Dependencies are inferred from the claim text.