摘要
Inorganic glasses doped with transition metal ions are becoming more and more important and hopeful as a kind of turnable laser materials, to which much attention has been paid. However, there has been no deep understanding about the microscopic mechanism of its luminescence. Recently along with the development of laser spectro-scopy of rare-earth ion doped crystals and glasses, the theory of photokineties and energy transfer has made considerable progress. Particularly, by using selective excita-
