Simultaneous Temperature and Strain Measurements Using Polarization-Maintaining Few-Mode Bragg Gratings

Simultaneous measurement of temperature and strain was demonstrated using a polarization-maintaining few-mode Bragg grating (PM-FMF-FBG) based on the wavelength and phase modulation of the even [Formula: see text] mode. The wavelength shift sensitivity and the interrogated phase sensitivity of the t...

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Detalles Bibliográficos
Autores principales: Wang, Chongxi, Huang, Zhanhua, Li, Guifang, Zhang, Shan, Zhao, Jian, Zhao, Ningbo, Cai, Huaiyu, Zhang, Yinxin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6928735/
https://www.ncbi.nlm.nih.gov/pubmed/31795112
http://dx.doi.org/10.3390/s19235221
Descripción
Sumario:Simultaneous measurement of temperature and strain was demonstrated using a polarization-maintaining few-mode Bragg grating (PM-FMF-FBG) based on the wavelength and phase modulation of the even [Formula: see text] mode. The wavelength shift sensitivity and the interrogated phase sensitivity of the temperature and strain were measured to be 10 pm·°C(−1) and 0.73 pm·με(−1) and −3.2 × 10(−2) rad·°C(−1) and 4 × 10(−4) rad·με(−1), respectively, with a discrimination efficiency of 98%. The polarization interference led to selective polarization excitation of the reflection spectra, and the calculated phase sensitivity agreed with the experimental results.

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