Patent · US Expired

Providing a refractive index change in an ion diffused material

US6393180B1 · kind B1 · utility

54Cited by

10References

11Claims

0Family size

Assignee

JDS Fitel Inc. · CA

Inventors

Mark Farries · Ottawa, CA
Barrie Keyworth · Ottawa, CA
Jan Ingenhoff · Tübingen, DE
Norbert Fabricius · Hockenheim, DE

Key dates

Filing date	Dec 3, 1998
Grant date	May 21, 2002
Priority date	—
Expiry date	Dec 3, 2018

Classification

Technology area (CPC G)Physics
CPC primaryG02B6/124
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A method of forming a grating in waveguide uses an ion exchange process to provide a waveguide region within and clad by a surrounding substrate and through an ion exchange process diffusing into the substrate an ion, such as such as Ag+, that is photosensitive and that provides a refractive index difference from adjacent non-diffused regions of the substrate. After the diffusion process, the step of exposing at least some of the waveguide region to light having a suitable intensity and duration to provide a permanent index change within regions of the waveguide region to form a grating is performed.

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