Bend-insensitive single mode optical fiber

US10641952B2 · kind B2 · utility

Assignee

• YANGTZE OPTICAL FIBRE AND CABLE JOINT STOCK LIMITED COMPANY · CN

Inventors

• Jiangang Yu · Hubei, CN
• Chen-Sheng Yang · Kaohsiung, TW
• Song Wang · Beijing, CN

Key dates

• Filing date: May 10, 2018
• Grant date: May 5, 2020
• Expiry date: May 10, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/2552
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A fused-biconical-taper bend-insensitive single mode optical fiber includes a core and a cladding. The core is a fluorine-germanium co-doped silicon-dioxide quartz glass layer, a diameter Dcore thereof is 7-10 μm, and a relative refractive index difference Δ1 thereof is 0.20% to 0.40%. A range of ΔGe is 0.30% to 0.60%, and a range of ΔF is −0.05% to −0.15%. The cladding includes three layers. A first layer is a fluorine-germanium co-doped silicon-dioxide quartz glass layer, a relative refractive index difference Δ31 thereof is −0.02% to −0.10%, and a diameter D31 thereof is 15-30 μm. A second layer is a fluorine-doped silicon-dioxide quartz glass layer, a relative refractive index difference Δ32 thereof is −0.01% to −0.05%, and a diameter D32 thereof is 30-50 μm. A third layer is a pure silicon-dioxide quartz glass layer, and a diameter D33 thereof is 124-126 μm.