Open AccessExcitation powder dependent optical temperature behavior of Er^3+ doped transparent Sr_069La_031F_231 glass ceramics
Author(s) -
Xiangfu Wang,
Qing Liu,
Peiqing Cai,
Jing Wang,
Lin Qin,
Thi Hong Quan Vu,
Hyo Jin Seo
Publication year - 2016
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.017792
Subject(s) - materials science , high resolution transmission electron microscopy , population , excitation , optics , doping , ceramic , analytical chemistry (journal) , temperature measurement , optoelectronics , transmission electron microscopy , nanotechnology , composite material , physics , chemistry , demography , chromatography , sociology , quantum mechanics
The knowledge of the pump power for which the population of thermally coupled energy levels (TCL) changes with power increase is of valuable importance for optical temperature sensors. In this paper, novel Er 3+ doped transparent Sr 0.69 La 0.31 F 2.31 glass ceramics was fabricated successfully, and its structure is studied by XRD, TEM and HRTEM analyses. The 2 H 11/2 / 4 S 3/2 , 4 F 9/2(1) / 4 F 9/2(2) , and 4 I 9/2(1) / 4 I 9/2(2) levels of Er 3+ are proved as TCL by analyzing the temperature dependent fluorescence intensity ratios. The spectrum split, thermal quenching ratio, population stability, and temperature sensitivity from three TCL are observed to be dependent on the pump power. A new fitting method has been developed to establish the relation between fluorescence intensity ratios and temperature. It is found that the combined use of 2 H 11/2 / 4 S 3/2 and 4 F 9/2(1) / 4 F 9/2(2) as thermally coupled energy levels will get a more precise temperature reading from 62.7 K to 800 K with the help of low excitation power at 66.8 mW/mm 2 .