The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 11, 2006
Filed:
Dec. 24, 2002
Eric Brandon, Bourg-la-Reine, FR;
Laurent Labrunie, Paris, FR;
Jean-pierre Blondel, Buc, FR;
François Boubal, Paris, FR;
Laurence Buet, Paris, FR;
Vincent Havard, Choisy-le-Roi, FR;
Patrice Le Roux, Villebon-sur-Yvette, FR;
Eric Brandon, Bourg-la-Reine, FR;
Laurent Labrunie, Paris, FR;
Jean-Pierre Blondel, Buc, FR;
François Boubal, Paris, FR;
Laurence Buet, Paris, FR;
Vincent Havard, Choisy-le-Roi, FR;
Patrice Le Roux, Villebon-sur-Yvette, FR;
Alcatel, Paris, FR;
Abstract
The invention refers to a safety procedure for optical fiber systems. Such systems are widely used in telecommunication to transport optical signals between a transmitter terminal and a receiver terminal. By the invented safety procedure the optical input power fed into said optical fiber system is automatically shut off or at least reduced in case of an unintended escape of light from at least one fiber. A safety interface, provided in the transmission line detects changes of the total optical output power in at least one fiber and initiates a shut-down of the input power as soon as a decrease of the total output power is detected, that exceeds a predefined value within a predefined time window. Thus the slope of the total output power is measured and evaluated rather than its absolute value.