Method and device for detecting absolute or relative temperature and/or absolute or relative wavelength

US11846559B2 · kind B2 · utility

Assignee

• ADTRAN NETWORKS SE · DE

Inventors

• Benjamin Wohlfeil · Berlin, DE
• Gilda Raoof Mehrpoor · Nuremberg, DE

Key dates

• Filing date: Dec 8, 2021
• Grant date: Dec 19, 2023
• Expiry date: Dec 8, 2041

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S5/06804
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An optical detection device and method for detecting temperature changes and/or wavelength changes of an optical probe signal includes transmitting an optical probe signal having a predetermined wavelength to an optical input port of an optical waveguide; detecting first and second optical detection signal at first and second optical output ports via first and second opto-electrical converters which create corresponding first and second electrical signals; measuring values of the first and second electrical signal and determining an absolute temperature or a temperature change of the optical waveguide and/or an absolute wavelength value or a wavelength change of the optical probe signal via values measured of the first and second electrical signals and first and second previously determined wavelengths and temperature dependencies of both first and second power transfer functions.