Increased capacity optical waveguide

US5483612A · kind A · utility

Assignee

• CORNING INCORPORATED · US

Inventors

• Daniel E. Gallagher · Big Flats, US
• Daniel Aloysius Nolan · Corning, US
• David K. Smith · Issaquah, US
• J. Richard Toler · Corning, US
• Grant P. Watkins · Corning, US

Key dates

• Filing date: Oct 17, 1994
• Grant date: Jan 9, 1996
• Expiry date: Oct 17, 2014

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/03611
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An compound core optical waveguide fiber designed for high data rate or single channel or WDM systems which may include optical amplifiers. The waveguide is characterized by a core having two or three regions wherein the refractive index can be varied. The relative size of the regions may also be varied. By adjusting these variables, the desired mode field diameter, zero dispersion wavelength, dispersion slope and cut off wavelength were obtained. The optical properties are chosen to limit non-linear effects while maintaining low attenuation and acceptable bend performance. In addition, the residual stress within the waveguide is maintained at a low level to limit stress induced birefringence. The low residual stress in the uncoated waveguide, together with a dual coating system having selected moduli and glass transition temperatures results in low polarization mode dispersion.