Optical temperature sensing based on the near-infrared emissions from Nd³âº/Yb³âº codoped CaWO4.
Opt Lett
; 39(16): 4635-8, 2014 Aug 15.
Article
in En
| MEDLINE
| ID: mdl-25121836
ABSTRACT
Under a 980 nm diode laser excitation, the near-infrared (NIR) emissions from Nd3+4F7/2, 4F5/2, and 4F3/2 states in Nd3+/Yb3+ codoped CaWO4 powder were studied at temperatures ranging from 303 to 873 K. As the temperature increased, the NIR luminescence intensity was significantly enhanced and nearly 190-fold enhancement was achieved at 873 K compared with that at 303 K. By using the fluorescence intensity ratio technique, the thermometry behaviors through the NIR emissions were investigated. The results illustrate that the sensitivity and the accuracy achieved here are much higher than temperature sensors based on other rare earth ion doped materials.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Ytterbium
/
Thermography
/
Tungsten Compounds
/
Calcium Compounds
/
Spectroscopy, Near-Infrared
/
Niobium
Language:
En
Journal:
Opt Lett
Year:
2014
Document type:
Article