1 June 2002 Radiometric analysis of a fiber optic temperature sensor
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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.
© (2002) Society of Photo-Optical Instrumentation Engineers (SPIE)
Marija Strojnik, Marija Strojnik, Gonzalo Paez, Gonzalo Paez, Jesus Castrellon-Uribe, Jesus Castrellon-Uribe, } "Radiometric analysis of a fiber optic temperature sensor," Optical Engineering 41(6), (1 June 2002). https://doi.org/10.1117/1.1476690 . Submission:

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