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Optical Engineering

Radiometric analysis of a fiber optic temperature sensor
Author(s): Marija Strojnik; Gonzalo Paez; Jesus Castrellon-Uribe
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Paper Abstract

We analyze the performance of a fiber optic temperature sensor in terms of the standard radiometric figures of merit to optimize its design from the measured fluorescence spectrum. We apply this analysis to an erbium-doped silica fiber employing the intensity ratio technique. We develop the expressions for the SNR, the responsivity in the band, and the noise-equivalent power to predict and optimize the performance of each spectral channel, considering a number of spectral subbands. Incorporating narrow bands for each transition, we improve the SNR by a factor of 5 for each channel. We evaluate and predict the sensitivity of the sensor, incorporating the intensity ratio, to be around 0.025 K-1. The temperature resolution of this highly linear sensor is estimated at a value of about 0.1 K for the temperature interval from below room temperature to above 500°C.

Paper Details

Date Published: 1 June 2002
PDF: 7 pages
Opt. Eng. 41(6) doi: 10.1117/1.1476690
Published in: Optical Engineering Volume 41, Issue 6
Show Author Affiliations
Marija Strojnik, Ctr. de Investigaciones en Optica (United States)
Gonzalo Paez, Ctr. de Investigaciones en Optica (Mexico)
Jesus Castrellon-Uribe, Ctr. de Investigaciones en Optica (Mexico)

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