Bending-resistant large core diameter high numerical aperture multimode fiber

US9052435B2 · kind B2 · utility

Assignee

• EverPro Technologies Company Limited · CN

Inventors

• Shuqiang Zhang · Hubei, CN
• Yongtao Liu · Hubei, CN
• Song Wang · Beijing, CN
• Zhenbao He · Hubei, CN
• Jin XU · Zhejiang, CN

Key dates

• Filing date: Mar 13, 2012
• Grant date: Jun 9, 2015
• Expiry date: Jun 7, 2032

Classification

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

Abstract

A bending-resistant large core diameter high numerical aperture multimode fiber includes a core and a cladding surrounding the core. The core has a radius R1 in a range of 28 to 50 microns, a refractive index profile of a parabola shape with α being in a range of 1.9 to 2.2, and a maximum relative refractive index difference Δ1% max being in a range of 1.9% to 2.5%. The cladding includes an inner cladding and/or a trench cladding, and an outer cladding disposed from the inner to the outer in sequence. The radius R2 of the inner cladding is in a range of 28 to 55 microns, and the relative refractive index difference Δ2% is −0.1% to 0.1%. The radius R3 of the trench cladding is in a range of 28 to 60 microns, and the relative refractive index difference Δ3% is in a range of −0.15% to −0.8%.