Intensity-referenced and temperature-independent pressure sensing based on strain-chirped fiber Bragg grating

Tuan Guo; Qida Zhao; Lifang Xue; Junfeng Lv; Hong Kang; Bo Dong; Shuhong Li; Hong Gu; Guiling Huang; Xiaoyi Dong

doi:10.1117/12.726477

5 March 2007 Intensity-referenced and temperature-independent pressure sensing based on strain-chirped fiber Bragg grating

Tuan Guo, Qida Zhao, Lifang Xue, Junfeng Lv, Hong Kang, Bo Dong, Shuhong Li, Hong Gu, Guiling Huang, Xiaoyi Dong

Author Affiliations +

Proceedings Volume 6595, Fundamental Problems of Optoelectronics and Microelectronics III; 65953Q (2007) https://doi.org/10.1117/12.726477
Event: Fundamental Problems of Optoelectronics and Microelectronics III, 2006, Harbin, China

Abstract

Temperature-insensitive pressure measurement using a single fiber Bragg grating (FBG) based on reflection spectrum bandwidth modulation and optical power detection is proposed. A specially designed double-hole cantilever beam (DHCB) is used to provide pressure induced axial strain gradient along the sensing FBG and further modulate the reflection bandwidth of the grating. The bandwidth modulation immunes to spatially uniform temperature effect and the pressure can be unambiguous determined by reflected optical power measurement, avoiding the complex wavelength interrogation system. The thermal fluctuate of the system is less than 1.2 % F.S. for temperature range from -10°C to 80 °C without any temperature compensation.

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Tuan Guo, Qida Zhao, Lifang Xue, Junfeng Lv, Hong Kang, Bo Dong, Shuhong Li, Hong Gu, Guiling Huang, and Xiaoyi Dong "Intensity-referenced and temperature-independent pressure sensing based on strain-chirped fiber Bragg grating", Proc. SPIE 6595, Fundamental Problems of Optoelectronics and Microelectronics III, 65953Q (5 March 2007); https://doi.org/10.1117/12.726477

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