High-sensitivity fiber optic temperature sensor based on CTFBG-FPI and Vernier effect.
Opt Lett
; 48(15): 3845-3848, 2023 Aug 01.
Article
en En
| MEDLINE
| ID: mdl-37527064
ABSTRACT
A novel high-sensitivity temperature sensor based on a chirped thin-core fiber Bragg grating Fabry-Perot interferometer (CTFBG-FPI) and the Vernier effect is proposed and demonstrated. With femtosecond laser direct writing technology, two CTFBG-FPIs with different interferometric cavity lengths are inscribed inside a thin-core fiber to form a Vernier effect system. The two FPIs consist of two pairs of CTFBGs with a full width at half maximum (FWHM) of 66.5â
nm staggered in parallel. The interferometric cavity lengths of the two FPIs were designed to be 2 mm and 1.98 mm as the reference arm and sensing arm of the sensor, respectively. The temperature sensitivity of this sensor was measured to be -1.084â
nm/°C in a range of 40-90°C. This sensor is expected to play a crucial role in precision temperature measurement applications.
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Bases de datos:
MEDLINE
Tipo de estudio:
Diagnostic_studies
Idioma:
En
Revista:
Opt Lett
Año:
2023
Tipo del documento:
Article