Patent · US Expired

Single polarization optical fibers and methods of fabrication

US4179189A · kind A · utility

52Cited by

5References

7Claims

0Family size

Assignee

Bell Telephone Laboratories, Inc. · US

Inventors

Ivan P. Kaminow · Tinton Falls, US
Vellayan Ramaswamy · Lincroft, US

Key dates

Filing date	Jan 13, 1978
Grant date	Dec 18, 1979
Priority date	—
Expiry date	Jan 13, 1998

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC03B2203/30
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

Orthogonally polarized waves are more effectively decoupled in a waveguide that is fabricated in a manner so as to deliberately enhance stress-induced birefringence. This characteristic is accomplished by introducing a geometrical and material asymmetry in the preform from which the optical fiber is drawn. Three methods of preparing the preform are disclosed. Optical waveguides capable of transmitting power with only one direction of polarization are desirable for use with integrated optical devices which are polarization sensitive.

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