12-μm transitions in erbium-doped fibers: the possibility of quasi-distributed temperature sensors
- 20 July 1995
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 34 (21) , 4196-4199
- https://doi.org/10.1364/ao.34.004196
Abstract
We propose the principle of a high-dynamic, quasi-distributed temperature sensor based on the behavior of the 1.13- and the 1.24-μm emission lines in erbium-doped silica fibers. The ratio of fluorescent intensity of these lines presents a temperature dynamic of more than 11 dB between room temperature and 600 °C. As the lower level of these transitions is not the fundamental, the emission lines are absorption free, and no dependence of the intensity ratio of the two lines has been observed, with power and wavelength pump variations permitting the realization of self-calibrated quasi-distributed sensors.Keywords
This publication has 8 references indexed in Scilit:
- Thermalization effects between upper levels of green fluorescence in Er-doped silica fibersOptics Letters, 1994
- Multiphoton absorption and cooperative upconversion excitation in Er^3+-doped fibersOptics Letters, 1993
- Rare-earth doped optical fibers for temperature sensingJournal of Lightwave Technology, 1992
- Intermediate excited-state absorption in erbium-doped fiber strongly pumped at 980 nmOptics Letters, 1991
- Optical-fiber temperature sensor based on upconversion-excited fluorescenceOptics Letters, 1990
- Fabrication and properties of large core, high NA, high Nd 3+ content multimode optical fibres for temperature sensor applicationsElectronics Letters, 1990
- Pump excited state absorption in Er3+ doped optical fibresOptics Communications, 1989
- Distributed temperature sensor using Nd 3+ -doped optical fibreElectronics Letters, 1986