Lasers, Fiber Optics, and Communications

Dual-parameter optical fiber sensor based on intermodal interferometer with an inline embedded fiber Bragg grating

[+] Author Affiliations
Panpan Luan, Zhengrong Tong, Ye Cao

Tianjin University of Technology, School of Computer and Communication Engineering, Tianjin Key Laboratory of Film Electronic and Communication Devices, No. 391 Binshui West Road, Xiqing District, Tianjin 300384, China

Weihua Zhang

Tianjin University of Technology, School of Electronics Information Engineering, Tianjin Key Laboratory of Film Electronic and Communication Devices, No. 391 Binshui West Road, Xiqing District, Tianjin 300384, China

Opt. Eng. 54(3), 036104 (Mar 09, 2015). doi:10.1117/1.OE.54.3.036104
History: Received November 20, 2014; Accepted February 16, 2015
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Abstract.  A dual-parameter optical fiber sensor is proposed and demonstrated. It is based on an intermodal interferometer (IMI) with an inline embedded fiber Bragg grating (FBG). The IMI is formed by cascading a taper structure and a spherical-shaped structure through a segment of a single-mode fiber. Due to the different wavelength shifts of the IMI and FBG to temperature and liquid level, simultaneous measurement can be achieved. Experimental results indicate a good linear relation between the wavelength shift and external parameters (temperature and liquid level). The sensitivities of 0.066nm/°C and 0.133nm/mm are achieved experimentally for temperature and liquid level, respectively. The interesting properties of the sensor include good operation linearity, compact size, and high sensitivity.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Panpan Luan ; Zhengrong Tong ; Ye Cao and Weihua Zhang
"Dual-parameter optical fiber sensor based on intermodal interferometer with an inline embedded fiber Bragg grating", Opt. Eng. 54(3), 036104 (Mar 09, 2015). ; http://dx.doi.org/10.1117/1.OE.54.3.036104


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