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30 October 2018 Miniature fiber-optic sensor for simultaneous measurement of refractive index and temperature
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A miniature fiber-optic sensor fabricated by fuse splicing a section of hollow silica tube between two sections of single-mode fiber is proposed and experimentally demonstrated for simultaneous measurement of the liquid refractive index (RI) and temperature. The sensitivities of RI and temperature are measured by linear fitting, respectively, and corresponding detecting resolutions are obtained by the sensitivity matrix. The different response sensitivities of two dips to RI and temperature manifest that the structure proposed can be used for simultaneous measurement. The experimental evidence indicates that the miniature fiber sensor with advantages of easy fabrication, ultracompactness, and robustness is insensitive to axial strain.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2018/$25.00 © 2018 SPIE
Huaiyin Su, Yundong Zhang, Kai Ma, Yongpeng Zhao, and Fuxing Zhu "Miniature fiber-optic sensor for simultaneous measurement of refractive index and temperature," Optical Engineering 57(10), 106111 (30 October 2018).
Received: 12 March 2018; Accepted: 20 September 2018; Published: 30 October 2018

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