US 12,099,233 B2
Large-effective-mode-area low-loss optical fiber with optimized cladding components
Longfei Wang, Suzhou (CN); Fan Li, Suzhou (CN); and Lihong Sui, Suzhou (CN)
Assigned to JIANGSU ETERN OPTICAL FIBER TECHNOLOGY CO., LTD., Jiangsu (CN)
Appl. No. 17/922,135
Filed by JIANGSU ETERN OPTICAL FIBER TECHNOLOGY CO., LTD., Suzhou (CN)
PCT Filed Jul. 20, 2020, PCT No. PCT/CN2020/102938
§ 371(c)(1), (2) Date Dec. 23, 2022,
PCT Pub. No. WO2021/217905, PCT Pub. Date Nov. 4, 2021.
Claims priority of application No. 202010360880.9 (CN), filed on Apr. 30, 2020.
Prior Publication US 2023/0176277 A1, Jun. 8, 2023
Int. Cl. G02B 6/02 (2006.01); G02B 6/036 (2006.01)
CPC G02B 6/02009 (2013.01) [G02B 6/02395 (2013.01); G02B 6/03655 (2013.01); G02B 6/03683 (2013.01)] 10 Claims
OG exemplary drawing
 
1. 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.