Few-mode optical fiber

US10459158B2 · kind B2 · utility

Assignees

• STATE GRID JIANGXI ELECTRIC POWER COMPANY INFORMATION & TELECOMMUNICATION BRANCH · CN
• State Grid Corporation of China · CN
• JIANGSU UNIVERSITY · CN

Inventors

• Hua Wang · Binhai New Area, CN
• Mingyang Chen · Shaoxing, CN
• Ping-Hung Yin · Taipei, TW
• Luming Li · Beijing, CN
• Jin Wei · Jiaocheng District, CN
• Jihai Yang · Nanchang, CN
• Zhimin Cai · Nanchang, CN
• Yuanfeng Zhu · Nanchang, CN
• Hui Tian · Taichung, TW

Key dates

• Filing date: Jan 19, 2017
• Grant date: Oct 29, 2019
• Expiry date: Jan 19, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/028
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The refractive index of a fiber core of a few mode optical fiber is n1. A cladding layer surrounding the fiber core includes: a downward-concave cladding layer surrounding the fiber core, the refractive index thereof is n2; a first upward-convex cladding layer surrounding the downward-concave cladding layer, the refractive index thereof is n3; a second upward-convex cladding layer surrounding the first upward-convex cladding layer, the refractive index thereof is n4; an outer layer surrounding the second upward-convex cladding layer, the refractive index thereof is n5. The refractive indexes of the fiber core, the downward-concave cladding layer, the first upward-convex cladding layer, the second upward-convex cladding layer, the outer layer satisfy: n1>n3>n4>n5>n2. The fiber is a non-single mode in a direct waveguide state, and equivalent single-mode transmission can be achieved when the optical fiber is bent at a specific bending radius.