| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10654235 | Solid State Communications | 2005 | 5 Pages |
Abstract
A NIR excitation of Er3+ doped Lithium modified tellurite (Li:TeO2) glass results in antistokes fluorescent emission near 380, 530, 551 and 654Â nm (ultraviolet, green and red regions) in addition to NIR Stokes emission. The antistokes emissions are ascribed to transition from the excited 4G11/2, 4S3/2(2H11/2) and 4F9/2 levels in Er3+. The excitation involves three and two incident photons. On excitation with the green laser line at 532Â nm also leads to similar emissions. The mechanisms involved in these processes are discussed on the basis of the known energy level diagram and the upconversion efficiency has been calculated. Lifetime of the 4S3/2 level has been measured. The temperature dependence of the upconversion process has also been investigated.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Anant Kumar Singh, S.B. Rai, D.K. Rai,