Bending-insensitive single-mode fiber with ultra low attenuation

US10018779B2 · kind B2 · utility

Assignee

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

Inventors

• Lei Zhang · Nanhu, CN
• Shengya Long · Hubei, CN
• Jihong Zhu · Hubei, CN
• Jun Wu · Hubei, CN
• Hongyan ZHOU · Shanghai, CN
• Rui Zhang · Hubei, CN
• Ruichun Wang · Hubei, CN

Key dates

• Filing date: Oct 17, 2017
• Grant date: Jul 10, 2018
• Expiry date: Oct 17, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/03683
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A bending-insensitive single-mode fiber with ultralow attenuation includes a core layer and cladding layers. The cladding layers includes 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 cladding layer. The core layer has a radius of 3.0 to 3.9 μm and a relative refractive index of −0.04% to 0.12%. The inner cladding layer has a radius of 8 to 14 μm and a relative refractive index −0.35% to −0.10%. The trench cladding layer has a radius of 14 to 20 μm and a relative refractive index of −0.6% to −0.2%. The auxiliary outer cladding layer has a radius of 35 to 50 μm and a relative refractive index of −0.4% to −0.15%. The outer cladding layer is a pure silica glass layer.