Patent · US Expired

Optical differentiation device

US6628855B1 · kind B1 · utility

1Cited by

1References

13Claims

0Family size

Assignee

ALCATEL · FR

Inventors

Alexandre Shen · Palaiseau, FR
Jean-Guy Provost · Saint-Michel-sur-Orge, FR
Fabrice Devaux · Pully, CH
Bernd Sartorius · Berlin, DE
Tolga Tekin · Berlin, DE
Michael Schlak · Berlin, DE
Cristopher Janz · Ottawa, CA

Key dates

Filing date	Mar 28, 2001
Grant date	Sep 30, 2003
Priority date	—
Expiry date	Sep 2, 2021

Classification

Technology area (CPC G)Physics
CPC primaryG02F2203/26
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

An optical device for the differentiation of a first optical signal and an optical signal lagging behind the first, in which the differentiation is represented by a signal carried by a continuous wave passing through the two arms of an interferometer including media with an index that depends on the optical power passing through them. The delayed signal is the first signal fed back to one of the arms through a delay.

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