Large numerical aperture bend resistant multimode optical fiber

US7903918B1 · kind B1 · utility

Assignee

• CORNING INCORPORATED · US

Inventors

• Scott Robertson Bickham · Corning, US
• Ming-Jun Li · Horseheads, US

Key dates

• Filing date: Feb 22, 2010
• Grant date: Mar 8, 2011
• Expiry date: Feb 22, 2030

Classification

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

Abstract

Bend resistant optical fibers which are multi-moded at 1300 nm include a core, an inner cladding, a low index ring and an outer cladding. The core has a graded index of refraction with a core alpha profile where 1.9≦αC≦2.1, a maximum relative refractive index percent Δ1Max%, and a numerical aperture NA of greater than 0.23. The inner cladding surrounds the core and has a maximum relative refractive index percent Δ2Max%, a minimum relative refractive index percent Δ2Min%, and a radial thickness ≧0.5 microns, wherein Δ1Max%>Δ2Max%. The low index ring surrounds the inner cladding and has a relative refractive index percent Δ3%, a radial thickness of at least 0.5 microns, a profile volume with an absolute magnitude of greater than 50%-μm2, wherein Δ2Min%≧Δ3%. The outer cladding surrounds the low index ring and has a relative refractive index percent Δ4%, such that Δ1Max%>Δ4%≧Δ2Max%.