High resolution temperature sensor based on frequency beating between twin DFB fiber lasers
| Autor: | Tommy Boilard, Laurent Dusablon, Vincent Fortin, Martin Bernier, François Babin, Réal Vallée, Pierre Galarneau |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Strain measurement Physics::Optics Photodetector High resolution 02 engineering and technology Signal 01 natural sciences law.invention 010309 optics 020210 optoelectronics & photonics Optics Fiber Bragg grating law Fiber laser 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Fiber Laser light business.industry 010401 analytical chemistry Resolution (electron density) Laser Atomic and Molecular Physics and Optics 0104 chemical sciences Fiber optic sensor Femtosecond Optoelectronics business Sensitivity (electronics) |
| Zdroj: | Scopus-Elsevier |
| DOI: | 10.1364/assl.2020.jtu5a.8 |
| Popis: | We present a high resolution temperature sensor using the beat frequency between the longitudinal modes of twin single-mode distributed feedback fiber lasers. The lasers are made by femtosecond inscription of π-shifted fiber Bragg gratings in a thulium-doped fiber. Combining the light from two single frequency fiber lasers on a photodetector produces a rf beat frequency signal which is dependent on temperature. Experimental results show a sensitivity of 1900 MHz/°C, leading to a precision of 0.0007 °C. |
| Databáze: | OpenAIRE |
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