17 May 2011 Interferometric system controlled by virtual instrumentation for differential thermal analysis
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Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77531U (2011) https://doi.org/10.1117/12.886019
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada
Abstract
This work describes the implementation of an optical fiber interferometric system for differential thermal analysis. The system is based on a white light Mach-Zehnder configuration, with serrodyne phase modulation, to interrogate two identical fiber Bragg gratings (FBG) in a differential scheme. Operation and signal processing with low cost digital instrumentation developed in Labview environment enabled FBG temperature measurement with a ±0.012ºC resolution nearly matching the performance of standard hardware. Preliminary results were obtained, where mixed samples of acetone and methanol could be successfully identified, indicating the suitability of the system for high accuracy differential thermal analysis using low cost instrumentation.
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L. C. Gonçalves, L. C. Gonçalves, G. González-Aguilar, G. González-Aguilar, J. M. Baptista, J. M. Baptista, P. A. S. Jorge, P. A. S. Jorge, } "Interferometric system controlled by virtual instrumentation for differential thermal analysis", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77531U (17 May 2011); doi: 10.1117/12.886019; https://doi.org/10.1117/12.886019
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