Graded refractive index bending-resistant multimode optical fiber

US9297953B2 · kind B2 · utility

Assignee

• EverPro Technologies Company Limited · CN

Inventors

• Song Wang · Beijing, CN
• Zhipan Zhou · Hubei, CN
• Yongtao Liu · Hubei, CN
• Jin XU · Zhejiang, CN
• Mingfeng Fan · Hubei, CN
• Shuqiang Zhang · Hubei, CN
• Wei Wang · Tangxia, CN

Key dates

• Filing date: Nov 21, 2014
• Grant date: Mar 29, 2016
• Expiry date: Nov 21, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/03644
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A graded refractive index bending-resistant multimode optical fiber includes a core layer and claddings. The core layer has a radius in a range of 20-50 μm; refractive indexes being a graded refractive index distribution with a distribution exponent α in a range of 1.89-1.97; and a maximum relative refractive index difference (RRID) Δ1% max in a range of 0.9%-2.72%. The claddings has an inner cladding surrounding the core layer, an intermediate cladding surrounding the inner cladding and an outer cladding surrounding the inner cladding. The inner cladding has a radius in a range of 22-57 μm, and an RRID Δ2% in a range of −0.02%-0.02%. The intermediate cladding is a pure quartz glass layer, and has a radius in a range of 32-60 μm, and an RRID Δ3% in a range of −0.01%-0.01%.