Low dispension single mode fiber

US4447125A · kind A · utility

Assignee

• Bell Telephone Laboratories, Inc. · US

Inventors

• Paul D. Lazay · New Providence, US
• Paul J. Lemaire · Madison, US
• Arthur D. Pearson · Bernardsville, US

Key dates

• Filing date: Apr 1, 1982
• Grant date: May 8, 1984
• Expiry date: Apr 1, 2002

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/02214
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A low-loss single mode fiber with low total dispersion within the wavelength range 1.25-1.385 .mu.m and low added cabling loss is disclosed. The fiber has relatively high .DELTA. to assure low cabling loss. The high .DELTA. is obtained, however, without paying a cost in high material dispersion by providing at least 20 percent of the .DELTA. by down-doping of the fiber cladding.