Fiber optic wavelength modulation sensor for absolute temperature measurements

Mehmet Naci Inci; Toshihiko T. Yoshino

doi:10.1117/12.372978

9 December 1999 Fiber optic wavelength modulation sensor for absolute temperature measurements

Mehmet Naci Inci, Toshihiko T. Yoshino

Proceedings Volume 3860, Fiber Optic Sensor Technology and Applications; (1999) https://doi.org/10.1117/12.372978
Event: Photonics East '99, 1999, Boston, MA, United States

Abstract

A fiber optic wavelength modulation sensor based on the spectral shift of tantalum pentoxide thin films for absolute temperature sensing up to 650 degrees Celsius is described. A tantalum pentoxide single layer was deposited directly onto the cleaved end-face of a single mode optical fiber and was illuminated with a super luminescent diode (SLD) through an addressing fiber. Interference fringes of the film on reflection were obtained within the optical bandwidth of the SLD using an optical spectrum analyzer. The spectral shift versus temperature rise showed no turning points and the output was unambiguous, linear, monotonic and gave about 0.016 nm wavelength shift in the spectrum per 1 degree Celsius. A semi-empirical calibration procedure for reading absolute thermometric measurements is presented.

Citation Download Citation

Mehmet Naci Inci and Toshihiko T. Yoshino "Fiber optic wavelength modulation sensor for absolute temperature measurements", Proc. SPIE 3860, Fiber Optic Sensor Technology and Applications, (9 December 1999); https://doi.org/10.1117/12.372978

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