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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 16 — Jun. 1, 2003
  • pp: 3251–3258

Erbium-doped optical fiber fluorescence temperature sensor with enhanced sensitivity, a high signal-to-noise ratio, and a power ratio in the 520–530- and 550–560-nm bands

Gonzalo Paez and Marija Strojnik  »View Author Affiliations


Applied Optics, Vol. 42, Issue 16, pp. 3251-3258 (2003)
http://dx.doi.org/10.1364/AO.42.003251


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Abstract

We analyze and predict the performance of a fiber-optic temperature sensor from the measured fluorescence spectrum to optimize its design. We apply this analysis to an erbium-doped silica fiber by employing the power-ratio technique. We develop expressions for the signal-to-noise ratio in a band to optimize sensor performance in each spectral channel. We improve the signal-to-noise ratio by a factor of 5 for each channel, compared with earlier results. We evaluate the analytical expression for the sensor sensitivity and predict it to be approximately 0.02 °C-1 for the temperature interval from room temperature to above 200 °C, increasing from 0.01 °C-1 at the edges of the interval to 0.03 °C-1 at the center, at 100–130 °C. The sensitivity again increases at temperatures higher than 300 °C, delineating its useful temperature intervals.

© 2003 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.2410) Fiber optics and optical communications : Fibers, erbium
(120.5630) Instrumentation, measurement, and metrology : Radiometry
(120.6780) Instrumentation, measurement, and metrology : Temperature
(300.2530) Spectroscopy : Fluorescence, laser-induced

History
Original Manuscript: January 30, 2003
Published: June 1, 2003

Citation
Gonzalo Paez and Marija Strojnik, "Erbium-doped optical fiber fluorescence temperature sensor with enhanced sensitivity, a high signal-to-noise ratio, and a power ratio in the 520–530- and 550–560-nm bands," Appl. Opt. 42, 3251-3258 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-16-3251

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