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

Panpan Luan; Zhengrong Tong; Ye Cao; Weihua Zhang

doi:10.1117/1.OE.54.3.036104

9 March 2015 Dual-parameter optical fiber sensor based on intermodal interferometer with an inline embedded fiber Bragg grating

Panpan Luan, Zhengrong Tong, Ye Cao, Weihua Zhang

Author Affiliations +

Optical Engineering, Vol. 54, Issue 3, 036104 (March 2015). https://doi.org/10.1117/1.OE.54.3.036104

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 0.066 nm/°C and −0.133 nm/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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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," Optical Engineering 54(3), 036104 (9 March 2015). https://doi.org/10.1117/1.OE.54.3.036104

Published: 9 March 2015

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