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Proceedings Paper

Interrogation of in-series double cladding fiber sensor for simultaneous refractive index and temperature measurement
Author(s): Bo Qi; Fufei Pang; Tingyun Wang; Na Chen; Sujuan Huang; Zhenyi Chen
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Paper Abstract

An interrogation scheme for an in-series double cladding fiber (DCF) sensor is proposed and demonstrated, which can be used for simultaneous refractive index (RI) and temperature measurement. It utilizes two commercial distributed feedback lasers to match two cascade DCF sensors which have two band-rejected filtering spectra at different wavelengths. The two lasers were intensity modulated by different frequencies and demodulated by a lock-in amplifier. Experimental results indicated that a resolution of ±2×10-5 in RI and ±1.2°Cin temperature were achieved. Based on the simple and low cost interrogation scheme, the dual parameters sensor system will find potential applications in chemical sensors and biosensors.

Paper Details

Date Published: 19 May 2012
PDF: 6 pages
Proc. SPIE 8376, Photonic Microdevices/Microstructures for Sensing IV, 83760F (19 May 2012); doi: 10.1117/12.919183
Show Author Affiliations
Bo Qi, Shanghai Univ. (China)
Fufei Pang, Shanghai Univ. (China)
Tingyun Wang, Shanghai Univ. (China)
Na Chen, Shanghai Univ. (China)
Sujuan Huang, Shanghai Univ. (China)
Zhenyi Chen, Shanghai Univ. (China)


Published in SPIE Proceedings Vol. 8376:
Photonic Microdevices/Microstructures for Sensing IV
Xudong Fan; Hai Xiao; Anbo Wang, Editor(s)

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