Abstract
Eccentric fiber Bragg grating (EFBG) is inscribed in standard communication single-mode fiber using femtosecond laser pulses, and the temperature and strain sensing characteristics are experimentally demonstrated and analyzed. The EFBG exhibits strong thermal stability and good robustness in high-temperature measurement up to 1000 °C, and undergoes different thermal sensitivities during Bragg peak and the strong resonance coupled cladding spectral comb. The temperature sensitivity linearly increases with respect to the effective index of the resonant modes. Such a situation also occurs in axial strain measurement. These characteristics are of high interest for multiparametric sensing at high temperatures.
Original language | English |
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Article number | e17185 |
Number of pages | 8 |
Journal | Heliyon |
Volume | 9 |
Issue number | 6 |
Early online date | 11 Jun 2023 |
DOIs | |
Publication status | E-pub ahead of print - 11 Jun 2023 |
Keywords
- Eccentric fiber Bragg gratings
- Femtosecond laser
- High temperature
- Strain
- Sensor