Optical fiber with large effective area

US9261646B2 · kind B2 · utility

Assignee

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

Inventors

• Su-Chen Chen · New Taipei, TW
• Chen-Sheng Yang · Kaohsiung, TW
• Beibei Cao · 红钢城街道, CN
• Weijun Tong · 红钢城街道, CN
• Jie Luo · Hubei, CN

Key dates

• Filing date: Jul 3, 2013
• Grant date: Feb 16, 2016
• Expiry date: Jul 3, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/03688
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An optical fiber with a large effective area includes a core layer and a cladding layer. The core layer comprises an inner core layer having a radius of 1-4 μm and a relative refractive index difference Δ12 of −0.2%≧Δ12<0% relative to the outer core layer, and an outer core layer having a radius of 4-7 μm and a relative refractive index difference Δ2 of −0.15%-0.05%. Δ12 remains unchanged or increases as the radius of the inner core layer increases. The cladding layer comprises an inner cladding layer cladding the core layer and having a radius of 7-20 μm and a relative refractive index difference Δ3 of −0.5%˜−0.1%, a depressed cladding layer has a radius of 12-40 μm, and a relative refractive index difference Δ4 of −1.0%˜−0.3%, and an outer cladding layer having a relative refractive index difference Δ5 of −0.2%˜−0.4%.