Single mode optical fiber with large effective area

US9207396B2 · kind B2 · utility

Assignee

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

Inventors

• Runhan Wang · Hubei, CN
• Shengya Long · Hubei, CN
• Mengxun Sun · Hubei, CN
• Hongyan ZHOU · Shanghai, CN
• Mingfeng Mao · Hubei, CN
• Zhiyong Wang · Sunnyvale, US

Key dates

• Filing date: Jul 3, 2013
• Grant date: Dec 8, 2015
• Expiry date: Jul 3, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/03661
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A single-mode fiber with a large effective area comprises a core layer and a cladding layer. The core layer is cladded with an intermediate cladding layer, and a depressed cladding layer is provided outside the intermediate cladding layer. The core layer comprises a first fiber sub core layer having a radius r1 of 1.5-5 μm and a relative refractive index difference Δn1 of 0.05-0.22%, and a second sub core layer having a unilateral radial width (r2−r1) of 1.5-5 μm and a relative refractive index difference Δn2 of 0.15-0.34%, where Δn1 is less than Δn2. Accordingly, the optical fiber can reach an effective area equal to or greater than 120 μm2 when the related parameters thereof are optimized.