High-bandwidth bend-insensitive multimode fiber

US11841530B2 · kind B2 · utility

Assignee

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

Inventors

• Wufeng Xiao · Hubei, CN
• Rong Huang · Longbeilingcun, CN
• Haiying Wang · Shandong, CN
• Runhan Wang · Hubei, CN
• Honghai Wang · Hubei, CN
• Ruichun Wang · Hubei, CN

Key dates

• Filing date: Apr 11, 2019
• Grant date: Dec 12, 2023
• Expiry date: Jul 26, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/0365
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A high-bandwidth bend-insensitive multimode fiber includes a core laver and a cladding including an inner cladding, a depressed cladding, and an outer cladding arranged sequentially from inside to outside. The core layer is a silicon dioxide glass layer co-doped with germanium, phosphorus (P), and fluorine (F) and has a refractive index profile in a shape of a parabola, a distribution index in a range of 2.0-2.3, a radius in a range of 23-27 μm, and a maximum relative refractive index difference in a range of 0.9-1.2% at its center. A contribution amount of P at the center is in a range of 0.01-0.30%. A doping amount of F increases from the center to the edge of the core layer. A contribution amount of F at the center and edge of the core layer is in range of 0.0% to −0.1%, and −0.40% to −0.20%, respectively.