Optical fiber with large effective area

US7603015B2 · kind B2 · utility

Assignee

• CORNING INCORPORATED · US

Inventors

• Scott Robertson Bickham · Corning, US
• Dana Craig Bookbinder · Corning, US
• Xin Chen · Taoyuan, TW
• Ming-Jun Li · Horseheads, US
• Snigdharaj Kumar Mishra · Wilmington, US
• Daniel Aloysius Nolan · Corning, US
• Pushkar Tandon · Corning, US

Key dates

• Filing date: Feb 21, 2008
• Grant date: Oct 13, 2009
• Expiry date: Mar 5, 2028

Classification

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

Abstract

An optical fiber comprising: a glass core extending from a centerline to a radius R1; a glass cladding surrounding and in contact with the core, the cladding comprising: a first annular region extending from R1 to a radius R2, the first annular region comprising a radial width, W2=R2−R1, a second annular region extending from R2 to a radius R3, the second annular region comprising a radial width, W3=R3−R2, and a third annular region extending from R3 to an outermost glass radius R4; wherein (i) the core comprises a maximum relative refractive index, Δ1MAX, relative to the third annular region; (ii) wherein the first annular region comprises a radial width W2; and (iii) the second annular region comprises a minimum relative refractive index, Δ3MIN, relative to the third annular region wherein Δ1MAX>Δ2MAX>Δ3MIN, and Δ2MIN>Δ3MIN; and the core and the cladding provide a fiber with cable cutoff less than 1500 nm, dispersion at 1550 nm less than 12 ps/nm/km, effective area at 1550 nm greater than 60 μm2, and preferably greater than 70 μm2. The second annular cladding region may contain a plurality of randomly dispersed holes.