The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 30, 2014
Filed:
Nov. 16, 2011
Chen Yang, Wuhan, CN;
Beibei Cao, Wuhan, CN;
Su Chen, Wuhan, CN;
Weijun Tong, Wuhan, CN;
Xianyuan NI, Wuhan, CN;
Jie Luo, Wuhan, CN;
Chen Yang, Wuhan, CN;
Beibei Cao, Wuhan, CN;
Su Chen, Wuhan, CN;
Weijun Tong, Wuhan, CN;
Xianyuan Ni, Wuhan, CN;
Jie Luo, Wuhan, CN;
Yangze Optical Fibre and Cable Company Ltd., Wuhan, Hubei, CN;
Abstract
A low attenuation single mode optical fiber includes a core layer and claddings. The core layer has the relative refractive index difference (RRID) Δ1 ranging from −0.1% to +0.1% and the radius Rranging from 4.0 μm to 6.0 μm. The claddings have three claddings layers surrounding the core layer. The RRID of the first cladding layer Δ2 ranges from −0.2% to −0.6%, and the radius Rthereof ranges from 10 μm to 22 μm. The RRID of the second cladding layer Δ3 is less than Δ2. The RRID and radius of the first cladding layer and the RRID and radius of the second cladding layer satisfy the relationship of: V=(Δ2−Δ3)×(R−R), and the value of V ranges from 0.15% μm to 0.8% μm. The third cladding layer is all the layers that closely surround the second cladding layer, and the RRID of each layer is greater than Δ3.