Low-dispersion single-mode optical fiber

US11435519B2 · kind B2 · utility

Assignee

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

Inventors

• Lei Zhang · Nanhu, CN
• Ruichun Wang · Hubei, CN
• Rui Zhang · Hubei, CN
• Chao-Yu Wu · Taipei, TW
• Lan Deng · Shanghai, CN
• Hongyan ZHOU · Shanghai, CN
• Lei Shen · Nanjing, CN
• Jie Luo · Hubei, CN

Key dates

• Filing date: Oct 20, 2020
• Grant date: Sep 6, 2022
• Expiry date: Oct 20, 2040

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02A30/00
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A low-dispersion single-mode optical fiber includes a core and a cladding covering the core. The core has a relative refractive index difference of 0.30-0.65% and a radius of 2.5-4.5 μm. The cladding layer including first, second, third cladding layers and an outer cladding arranged sequentially from inside to outside. The first cladding layer covers the core, and has a relative refractive index difference of −0.70% to −0.30% and a radius of 4.5-7.5 μm. The second cladding layer covers the first cladding layer, and has a relative refractive index difference of −0.20% to 0.25% and a radius of 7.0-12.0 μm. The third cladding layer covers the second cladding layer, and has a relative refractive index difference of −0.60% to 0.00% and a radius of 10.0-20.0 μm. The outer cladding covers the third cladding layer, and is a layer made of pure silicon dioxide glass.