Single mode optical fiber with ultra-low attenuation and bend insensibility

US10151873B2 · kind B2 · utility

Assignee

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

Inventors

• Jihong Zhu · Hubei, CN
• Lei Zhang · Nanhu, CN
• Shengya Long · Hubei, CN
• Jun Wu · Hubei, CN
• Liang Al · Hubei, CN
• Ruichun Wang · Hubei, CN

Key dates

• Filing date: Jan 4, 2018
• Grant date: Dec 11, 2018
• Expiry date: Jan 4, 2038

Classification

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

Abstract

An optical fiber with ultra-low attenuation and bend insensitivity includes a core layer and cladding layers. The cladding layers have 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 core layer has a radius of 3.0-3.9 μm, and a relative refractive index difference of −0.04% to 0.12%. The inner cladding layer has a radius of 8-14 μm, and a relative refractive index difference of about −0.35% to −0.10%. The trench cladding layer has a radius of about 14-20 μm, and a relative refractive index difference of about −0.6% to −0.2%. The auxiliary outer cladding layer has a radius of about 35-50 μm, and a relative refractive index difference of about −0.4% to −0.15%. The outer cladding layer is a pure silicon-dioxide glass layer.