Title :
Absolute measurement of phosphorescent cross sections for upconverting phosphors
Author :
Yihong Chen ; Faris, G.
Author_Institution :
Molecular Phys. Lab., SRI Int., Menlo Park, CA, USA
Abstract :
Summary form only given. A measurement of the absolute phosphorescence emission per particle for (Y/sub 0.86/Yb/sub 0.08/Er/sub 0.062/O/sub 2/S) upconverting phosphor particles as a function of excitation intensity is shown. The phosphorescence cross section is equal to the ratio of the emitted power to the excitation intensity. The phosphorescence cross section for upconverting phosphors is a strong function of excitation intensity. The intensity dependence of the phosphors is separately measured on powder phosphor samples. To minimize thermal effects on this measurement, the powder phosphor samples are rotated in the laser beam. The spot size of the laser is measured with a CCD camera.
Keywords :
erbium compounds; laser beam effects; phosphorescence; phosphors; ytterbium compounds; yttrium compounds; (Y/sub 0.86/Yb/sub 0.08/Er/sub 0.062/O/sub 2/S); (Y/sub 0.86/Yb/sub 0.08/Er/sub 0.062/O/sub 2/S) upconverting phosphor particles; CCD camera; absolute phosphorescence emission; emitted power; excitation intensity; laser beam; minimize thermal effects; phosphorescent cross sections; powder phosphor samples; spot size; upconverting phosphors; Charge coupled devices; Erbium; Laser beams; Laser excitation; Particle measurements; Phosphorescence; Phosphors; Powders; Rotation measurement; Size measurement;
Conference_Titel :
Lasers and Electro-Optics, 1998. CLEO 98. Technical Digest. Summaries of papers presented at the Conference on
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
1-55752-339-0
DOI :
10.1109/CLEO.1998.676094
