Ultraweak intrinsic Fabry-Perot cavity array for distributed sensing.
Opt Lett
; 40(3): 320-3, 2015 Feb 01.
Article
em En
| MEDLINE
| ID: mdl-25680037
ABSTRACT
This Letter reports on an ultraweak intrinsic Fabry-Perot interferometer (IFPI) array fabricated by a femtosecond (fs) laser for distributed sensing applications. Ultralow reflectors (<-60 dB) were obtained. IFPIs with different physical lengths showed identical temperature sensitivity (-1.5 GHz/°C). A distributed temperature sensing test was conducted. No crosstalk between IFPI elements in the array was observed, implying the device's utility as a distributed sensing system. The possibility of using smaller bandwidths for sensor interrogation was experimentally proven. A small-scale temperature distribution test was conducted on a continuously cascaded ultraweak IFPI array, demonstrating its high spatial resolution. The temperature detection limit of this system was measured to be less than 0.0667°C.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Interferometria
/
Lasers
Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article