Overlap Spectrum Fiber Bragg Grating Sensor Based on Light Power Demodulation

Demodulation is a bottleneck for applications involving fiber Bragg gratings (FBGs). An overlap spectrum FBG sensor based on a light power demodulation method is presented in this paper. The demodulation method uses two chirp FBGs (cFBGs) of which the reflection spectra partially overlap each other....

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Detalles Bibliográficos
Autores principales: Zhang, Hao, Jiang, Junzhen, Liu, Shuang, Chen, Huaixi, Zheng, Xiaoqian, Qiu, Yishen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5981642/
https://www.ncbi.nlm.nih.gov/pubmed/29772793
http://dx.doi.org/10.3390/s18051597
Descripción
Sumario:Demodulation is a bottleneck for applications involving fiber Bragg gratings (FBGs). An overlap spectrum FBG sensor based on a light power demodulation method is presented in this paper. The demodulation method uses two chirp FBGs (cFBGs) of which the reflection spectra partially overlap each other. The light power variation of the overlap spectrum can be linked to changes in the measurand, and the sensor function can be realized via this relationship. A temperature experiment showed that the relationship between the overlap power spectrum of the FBG sensor and temperature had good linearity and agreed with the theoretical analysis.

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