Abstract

The variation in the green intensity ratio (²H_11/2 and ⁴S_3/2 energy levels to the ground state) of Er ions in silica fibers has been studied as a function of temperature. The different processes that are used to determine the population of these levels are investigated, in particular 800-nm excited-state absorption in Er-doped fibers and 980-nm energy transfer, in Yb–Er-codoped fibers. The invariance of the intensity ratio at a fixed temperature with respect to power, wavelength, and doped fiber length has been investigated and shown to permit the realization of a high-dynamic-range (greater than 600 °C), autocalibrated fiber-optic temperature sensor.

© 1995 Optical Society of America

1.2-μm transitions in erbium-doped fibers: the possibility of quasi-distributed temperature sensors

Eric Maurice, Gérard Monnom, D. B. Ostrowsky, and G. W. Baxter
Appl. Opt. 34(21) 4196-4199 (1995)

Self-referenced point temperature sensor based on a fluorescence intensity ratio in Yb³⁺-doped silica fiber

Eric Maurice, Scott A. Wade, Stephen F. Collins, Gérard Monnom, and Greg W. Baxter
Appl. Opt. 36(31) 8264-8269 (1997)

Clustering effects on double energy transfer in heavily ytterbium–erbium-codoped silica fibers

Eric Maurice, Gérard Monnom, Bernard Dussardier, and D. B. Ostrowsky
J. Opt. Soc. Am. B 13(4) 693-701 (1996)

Strain-independent temperature measurement by use of a fluorescence intensity ratio technique in optical fiber

Scott A. Wade, Stephen F. Collins, Kenneth T. V. Grattan, and Gregory W. Baxter
Appl. Opt. 39(18) 3050-3052 (2000)

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
Appl. Opt. 42(16) 3251-3258 (2003)