Single-mode fiber with ultralow attenuation and large effective area

US9874687B2 · kind B2 · utility

Assignee

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

Inventors

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

Key dates

• Filing date: Mar 2, 2017
• Grant date: Jan 23, 2018
• Expiry date: Mar 13, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/02266
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A single-mode fiber with an ultra-low attenuation and a large effective area includes a core layer having a radius of 4.8 to 6.5 and a relative refractive index difference Δn1 of −0.06% to 0.10%, 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 inner cladding layer has a radius of 9 to 15 μm and a relative refractive index difference of −0.40% to −0.15%. The trench cladding layer has a radius of 12 to 17 μm and a relative refractive index difference of −0.8% to −0.3%. The auxiliary outer cladding layer has a radius of 37 to 50 μm and a relative refractive index difference of −0.6% to −0.25%. The outer cladding layer is a pure-silicon-dioxide glass layer.