Bending insensitive single mode optical fiber

US9201192B2 · kind B2 · utility

Assignee

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

Inventors

• Lei Zhang · Nanhu, CN
• Yiwen Wu · Stanford, US
• Ming Ye · Fort Worth, US
• Mingfeng Mao · Hubei, CN
• Zhiyong Wang · Sunnyvale, US
• Ruichun Wang · Hubei, CN
• Raadjkoemar Matai

Key dates

• Filing date: Mar 4, 2014
• Grant date: Dec 1, 2015
• Expiry date: Mar 4, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/03694
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

In one aspect of the invention, the bend insensitive single-mode optical fiber includes a core layer and cladding layers having an inner cladding layer, a trench cladding layer and an outer cladding layer sequentially formed surrounding the core layer from inside to outside. For the core layer, the diameter is 7-7.9 μm, and the relative refractive index difference Δ1 is between 4.6×10−3 and 6.5×10−3. For the inner cladding layer, the diameter is 16.5-20 μm, and a relative refractive index difference Δ2 is between −3×10−4 and 3×10−4. For the trench cladding layer, the diameter is 33-40 μm, and the relative refractive index difference Δ3 is between −2.9×10−3 and −7.3×10−3, changes in a gradient manner and increases gradually from outside to inside, where a relative refractive index difference Δ32 at an outermost interface is smaller than a relative refractive index difference Δ31 at an innermost interface.