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Using tunable laser diodes to classify cold drinks brands and interrogate an FBG-based temperature sensor

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Tunable diode laser spectroscopy is used to classify several soft drinks brands based on absolute measurement of concentration and pressure of CO2 in the bottle headspace. Accurate FBG-based temperature sensing is also realized with a narrow linewidth tunable 1650nm laser and a fiber ring resonator.

© 2014 Optical Society of America

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