Patent · US Expired

Waveguide structure

US6621971B2 · kind B2 · utility

1Cited by

3References

9Claims

0Family size

Assignee

JDS Uniphase Photonics GmbH & Co. · DE

Inventors

Xavier Orignac · Molsheim, FR
Norbert Fabricius · Hockenheim, DE
Wolfgang Foss · Kronau, DE

Key dates

Filing date	Sep 5, 2001
Grant date	Sep 16, 2003
Priority date	—
Expiry date	Sep 5, 2021

Classification

Technology area (CPC G)Physics
CPC primaryG02B2006/12038
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A glass planar waveguide structure, typically on a glass wafer or chip, has a core region, a contiguous narrow cladding region encompassing the core region, and an outer region practically extending over the rest of the wafer. The core region and the outer region are implanted with outside ions by ion diffusion, whereby the refractive index of the core and of the outer region are similar. The outer region forms an artificial waveguide to enhance the uniformity of physical properties of the wafer, e.g. stress, and reduce birefringence of the core.

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