Interrogation of optical fiber sensor networks

US11561119B2 · kind B2 · utility

Assignees

• FBGS TECHNOLOGIES GMBH · DE
• FBGS INTERNATIONAL NV · BE

Inventors

• Eric LINDNER · Jena, DE
• Johan Vlekken · Diepenbeek, BE
• Bram VAN HOE · Wondelgem, BE
• Christian VOIGTLANDER · Jena, DE
• Jan VAN ROOSBROECK · Hallaar, BE
• Steffen Lochmann · Dahlewitz, DE
• Andreas Ahrens · Dorf Mecklenburg, DE
• Marek Gotten · Hontheim, DE

Key dates

• Filing date: Oct 4, 2019
• Grant date: Jan 24, 2023
• Expiry date: Oct 7, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G01D5/35396
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A system for interrogating sensors in a fiber optical sensor network includes groups of sensors. The sensors in one group operate at different wavelengths, and the sensors of other groups may have overlapping wavelengths. A light source generates a broadband light signal, input and output means for guides the broadband light to the fiber optical sensor network for illuminating the sensors and for coupling the light signal coming from the sensors of the fiber optical sensor network to the detection system, and a detection system detects the received light signal, during a detection integration time. The system is arranged for selecting pre-dominantly the received light coming from the different sensors of a selected group of sensors using a code-division multiplexing technique and simultaneously detecting sensors of the selected group of sensors using a wavelength-division multiplexing technique.