Patent · US Expired

Graded index optical fiber

US4076380A · kind A · utility

39Cited by

1References

5Claims

0Family size

Assignee

Bell Telephone Laboratories, Inc. · US

Inventors

Frank Vincent DiMarcello · Annandale, US
John C. Williams · Duarte, US

Key dates

Filing date	Oct 28, 1976
Grant date	Feb 28, 1978
Priority date	—
Expiry date	Oct 28, 1996

Classification

Technology area (CPC G)Physics
CPC primaryG02B2006/0209
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A graded index optical fiber with a structure which results in improved pulse dispersion characteristics is disclosed. The refractive index properties of the fiber core may be defined in terms of coaxially nested tubular regions, each of different index of refraction, which together form a radially graded index of refraction. The optical properties of each tubular region vary periodically along the longitudinal direction. The longitudinal variation of each tubular region is in approximate antiphase with the longitudinal variation of the tubular regions immediately adjacent to it. In the disclosed structure each tubular region is composed of at least two intertwined helical ribbons of material.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.