Dual-wavelength fiber optic temperature sensor

Gang He; Marek T. Wlodarczyk

doi:10.1117/12.169929

9 March 1994 Dual-wavelength fiber optic temperature sensor

Gang He, Marek T. Wlodarczyk

Proceedings Volume 2070, Fiber Optic and Laser Sensors XI; (1994) https://doi.org/10.1117/12.169929
Event: Optical Tools for Manufacturing and Advanced Automation, 1993, Boston, MA, United States

Abstract

We describe a theoretical and experimental study of an intensity-based, dual-wavelength referenced fiber optic temperature sensor utilizing temperature-induced spectral shifts of optical thin-film interference coatings, deposited on a sensor fiber end. We present coating design considerations that lead to significant increase in transition region spectral shifts and coating-reflected signal modulations, for sensitive temperature measurement. Experimental results demonstrate that high density coating-based sensors provide consistent and repeatable temperature sensing, while low density coating-based sensors experience significant and inconsistent spectral variations and degradation under temperature cycling.

Citation Download Citation

Gang He and Marek T. Wlodarczyk "Dual-wavelength fiber optic temperature sensor", Proc. SPIE 2070, Fiber Optic and Laser Sensors XI, (9 March 1994); https://doi.org/10.1117/12.169929

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