1 June 2003 Experimental results of ratio-based erbium-doped-silica temperature sensor
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We describe experimental results demonstrating the performance of an erbium-doped silica fiber as a remote temperature sensor in the temperature interval 21 to 96°C. We present the measured fluorescence spectrum corresponding to the energy levels 2H11/2 and 4S3/2. This sensor features simple signal detection in a band and its data analysis system, incorporating a power ratio to reduce noise effects. The channel responsivity, power ratio, and sensitivity for a number of possible filters are presented. By using filters transmitting the 527- to 537-nm and 545- to 555-nm spectral bands, the following figures of merit are achieved: the responsivity is greater than 0.2 μW/K, and the sensitivity is 0.0065 K–1. With a custom-made filter centered on 545 nm, even higher sensitivity is predicted.
© (2003) Society of Photo-Optical Instrumentation Engineers (SPIE)
Gonzalo Paez, Gonzalo Paez, Marija Strojnik, Marija Strojnik, "Experimental results of ratio-based erbium-doped-silica temperature sensor," Optical Engineering 42(6), (1 June 2003). https://doi.org/10.1117/1.1571830 . Submission:

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