1 elcctronic energy level structure
2 transition intensities
3 ion-phonon interzctions
4 line broadening mechanisms and their measuremtnt
5 up- conversion in re-doped solids
6 current topic in arre-earth lasers
7 rare earth materials in optical storage and data processing applications
8 rare earth doped confined structures for lasers and amplifiers
9 rare earth luminescent centers in organic and biochemical compounds