Low bend loss optical fiber

US8849082B2 · kind B2 · utility

Assignee

• CORNING INCORPORATED · US

Inventors

• Dana Craig Bookbinder · Corning, US
• Ming-Jun Li · Horseheads, US
• Pushkar Tandon · Corning, US
• James Andrew West · Corning, US

Key dates

• Filing date: Nov 15, 2012
• Grant date: Sep 30, 2014
• Expiry date: Apr 9, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/0281
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An optical fiber comprising: (I) a germania doped central core region having outer radius r1 and (II) a maximum relative refractive index Δ1max and a cladding region including (i) a first inner cladding region having an outer radius r2>5 microns and refractive index Δ2; (ii) a and a second inner cladding region having an outer radius r3>9 microns and comprising refractive index Δ3; and (iii) an outer cladding region surrounding the inner cladding region and comprising refractive index Δ4, wherein Δ1max>Δ4, Δ2>Δ3, and wherein 0.01%≦Δ4−Δ3≦0.09%, said fiber exhibits a 22 m cable cutoff less than or equal to 1260 nm, and 0.25≦r1/r2≦0.85.