Temperature-Independent Strain Sensor based on Four-Wave Mixing using Raman FBG Laser Sensor with Cooperative Rayleigh Scattering

• Type: Article in International Conference Proceedings Book
• Date: 2011

Authors

martins, hf (Author) Other; marques, mb (Author) FCUP; frazao, o (Author) Other

Conference proceedings International

Title: 21ST INTERNATIONAL CONFERENCE ON OPTICAL FIBER SENSORS

21st International Conference on Optical Fiber Sensors

Ottawa, CANADA, MAY 15-19, 2011

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Other information

Authenticus ID: P-002-XB9

DOI: 10.1117/12.885219

Abstract (EN): A Temperature-independent strain sensor based on Four-Wave Mixing (FWM) using Raman fiber Bragg grating (FBG) laser sensor with cooperative Rayleigh scattering is proposed. Two FBG were used to form two linear cavities laser sensors based on Raman amplification combined with cooperative Rayleigh scattering. Due to the low dispersion coefficient of the fiber, it is possible to obtain the FWM using the two Raman FBG laser sensors. This configuration allows the operation as a temperature-independent strain sensor where both sensors are sensitive to temperature but only one of the FBG is sensitive to strain. The FWM efficiency is thus dependent on the applied strain but independent to the temperature.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4