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:
Jul. 10, 2018
Filed:
Oct. 04, 2017
Yangtze Optical Fibre and Cable Joint Stock Limited Company, Wuhan, Hubei, CN;
Lei Zhang, Hubei, CN;
Shengya Long, Hubei, CN;
Jihong Zhu, Hubei, CN;
Jun Wu, Hubei, CN;
Ruichun Wang, Hubei, CN;
YANGTZE OPTICAL FIBRE AND CABLE JOINT STOCK LIMITED COMPANY, Wuhan, Hubei, CN;
Abstract
A doping optimized single-mode optical fiber with ultra low attenuation includes a core layer and cladding layers. The cladding layers has an inner cladding layer surrounding the core layer, a trench cladding layer surrounding the inner cladding layer, an auxiliary outer cladding layer surrounding the trench cladding layer, and an outer cladding layer surrounding the auxiliary outer cladding layer. The content of fluorine in the core layer is ≤0.5 wt %, ΔGe≤0.12%, Δn≤0.12%. The content of fluorine in the inner cladding layer is 0.5-1.5 wt %, Δn≤−0.14%. The content of fluorine in the trench cladding layer is 1-3 wt %, Δn≤−0.25%. The content of fluorine in the auxiliary outer cladding layer is 0.5-2 wt %, Δn≤−0.14%. The outer cladding layer is a pure silicon dioxide glass layer and/or a metal-doped silicon dioxide glass layer.