Silicate waveguide compositions for extended L-band and S-band amplification

US6724972B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Mark T. Anderson · Woodbury, US
• Craig R. Schardt · Saint Paul, US
• James Onstott · Beldenville, US
• Kenton D. Budd · Woodbury, US

Key dates

• Filing date: Dec 31, 2001
• Grant date: Apr 20, 2004
• Expiry date: Feb 22, 2022

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S3/176
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

An optical waveguide including a core having silica, Al, a non-fluorescent rare-earth ion, Ge, Er, and Tm. The non-fluorescent rare-earth ion may be La. Exemplary compositions concentrations are Er is from 15 ppm to 3000 ppm, Al is from 0.5 mol % to 12 mol %, La is less than or equal to 2 mol %, Tm is from 15 ppm to 10,000 ppm; and the Ge is less than or equal to 15 mol %. The core may further include F. An exemplary concentration of F is less than or equal to 6 anion mol %.