Patent · US Expired

Optical mode filter

US5745614A · kind A · utility

14Cited by

5References

3Claims

0Family size

Assignee

Alcatel N.V. · NL

Inventors

Peter Kersten · Leonberg, DE
Johannes Koppenborg · Sersheim, DE
Jaakko Aarnio · Helsinki, FI

Key dates

Filing date	Sep 18, 1996
Grant date	Apr 28, 1998
Priority date	—
Expiry date	Sep 18, 2016

Classification

Technology area (CPC G)Physics
CPC primaryG02B6/14
WIPO fieldOptics
WIPO sectorInstruments

Abstract

An optical mode filter, that is, an optical component in which the basic mode can propagate undamped as much as possible but which in higher modes are strongly damped. The optical mode filter, is an integrated optical wave guide formed by, a higher-refracting or an absorbent material disposed near a flat wave guide core. Two buffer layers are located opposite the wave guide core, and one is formed with a thinned region to function as a filter for higher modes being transmitted through the wave guide core.

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