Low-dispersion single-mode optical fiber

US11550098B2 · kind B2 · utility

Assignee

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

Inventors

• Changkun Yan · Hubei, CN
• Wufeng Xiao · Hubei, CN
• Runhan Wang · Hubei, CN
• Tiejun Wang · Lin'an, CN
• Beibei Cao · 红钢城街道, CN
• Ming-Chieh Cheng · Taoyuan, TW

Key dates

• Filing date: Oct 20, 2020
• Grant date: Jan 10, 2023
• Expiry date: Oct 20, 2040

Classification

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

Abstract

A low-dispersion single-mode fiber includes a core and claddings covering the core. The core layer has a radius in a range of 3-5 μm and a relative refractive index difference in a range of 0.15% to 0.45%. The claddings comprise a first depressed cladding, a raised cladding, a second depressed cladding, and an outer cladding arranged sequentially from inside to outside. The first depressed cladding has a unilateral width in a range of 2-7 μm and a relative refractive index difference in a range of −0.4% to 0.03%. The raised cladding has a unilateral width in a range of 2-7 μm and a relative refractive index difference in a range of 0.05% to 0.20%. The second depressed cladding has a unilateral width in a range of 0-8 μm and a relative refractive index difference in a range of 0% to −0.2%. The outer cladding is formed of pure silicon dioxide glass.