Single mode optical fiber with chlorine doped core and low bend loss

US10444427B2 · kind B2 · utility

Assignee

• CORNING INCORPORATED · US

Inventors

• Dana Craig Bookbinder · Corning, US
• Ming-Jun Li · Horseheads, US
• Snigdharaj Kumar Mishra · Wilmington, US
• Pushkar Tandon · Corning, US

Key dates

• Filing date: Jul 26, 2017
• Grant date: Oct 15, 2019
• Expiry date: Jul 26, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/03666
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Single mode optical fibers with a chlorine doped core and a cladding having a fluorine doped trench region are disclosed. The optical fiber includes a chlorine doped silica core having a core alpha α≥10, a core radius r1 and maximum refractive index delta Δ1max % and a Cl concentration≥0.9 wt %. The optical fiber also has a cladding surrounding the core, the cladding having an inner and an outer cladding. The inner cladding has first and second cladding regions. The optical fiber has mode field diameter at 1310 nm of larger than 9 microns, a cable cutoff wavelength of ≤1260 nm, a zero dispersion wavelength λ0, where 1300 nm≤λ0≤1324 nm, and bend loss at 1550 nm for a 20 mm mandrel of less than 0.5 dB/turn.