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Proceedings Paper

Temperature independent refractive index measurement using white light interferometry
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Paper Abstract

In this work a fiber optic interferometric system for differential refractive index measurement is described. The system is based on a white light Mach-Zehnder configuration, with serrodyne phase modulation, to interrogate two similar nonadiabatic tapered optical fiber sensors in a differential scheme. In this situation it is possible to measure the refractive index independent of temperature. Signal processing with low cost digital instrumentation developed in Labview environment allows a detectable change in refractive index of Δn≈2x10-6, which is, from the best of our knowledge the highest resolution achieved using a fiber taper device. The results demonstrate the potential of the proposed scheme to operate as chemical and biological sensing platform.

Paper Details

Date Published: 7 November 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84216O (7 November 2012); doi: 10.1117/12.975650
Show Author Affiliations
C. Gouveia, INESC Porto (Portugal)
Univ. da Madeira (Portugal)
M. Zibaii, Shahid Beheshti Univ. (Iran, Islamic Republic of)
H. Latifi, Shahid Beheshti Univ. (Iran, Islamic Republic of)
M. J. Marques, INESC Porto (Portugal)
FCUP (Portugal)
J. M. Baptista, INESC Porto (Portugal)
Univ. da Madeira (Portugal)
P. A. S. Jorge, INESC Porto (Portugal)

Published in SPIE Proceedings Vol. 8421:
OFS2012 22nd International Conference on Optical Fiber Sensors
Yanbiao Liao; Wei Jin; David D. Sampson; Ryozo Yamauchi; Youngjoo Chung; Kentaro Nakamura; Yunjiang Rao, Editor(s)

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