High dynamic range temperature point sensor using green fluorescence intensity ratio in erbium-doped silica fiber

Abstract

We propose a sensor based on the temperature dependant behavior of the two lines of green emission of the erbium ion. The ratio of the intensities of these two lines presents a very low dependance on pump wavelength and pump power fluctuations. The sensitivity of the ratio is 0.013PC between room temperature and 600" C. In addition, the measurement is selfcalibrated.

Phonon-assisted cooperative energy transfer and frequency upconversion in a Yb3+/Tb3+ codoped fluoroindate glass

“…PA processes have proved to be useful in applications such as temperature sensors, 21,22 UC lasers, 23 laser cooling of solids, 24,25 and phase-conjugated mirrors. 26 It was also shown that the laser threshold of a fiber laser could be reduced as well as its output power enhanced using a PA excitation scheme.…”

Thermo-optical tuning of whispering gallery modes in Er:Yb co-doped phosphate glass microspheres

“…The change in refractive index is assumed to be negligible [10,15], since it is typically ten times smaller than the cavity expansion rate.…”

“…The main transition processes for Er:Yb phosphate glass pumped around 978 nm have been extensively described elsewhere [10,15,16]. Boltzmann statistics can be used to describe the strong thermal coupling and the population redistribution between the 2 H 11/2 and 4 S 3/2 erbium energy levels that lead to green emissions at 530 nm and 554 nm respectively on decay to the **** The largest measured 530:554 nm intensity ratio for IOG-2 is 3.5, equivalent to a temperature over 800 K [18].…”

Comparison of two temperature measurement methods by upconversion fluorescence spectra of erbium-doped lead-fluoride nano-glass-ceramics

“…флуоресценция с длиной волны, меньшей длины волны накачки, продемонстрирована для большинства редкоземельных элементов [1]. Интерес к этому явлению обусловлен возможностью его использования для преобразования частоты оптического излуче-ния в солнечных фотоэлементах [2] и фотовольтаических устройствах [3], дисплеях, сенсорах [4] и дру-гих устройствах, в микроскопии биологических объектов [5], а также для лазерной генерации [6,7]. Ак-туальным является исследование флуоресценции активаторов в различных материалах, в том числе в наноструктурированных [8,9].…”