Energy Transfer in Iron?Doped Yttrium Aluminum Garnet Academic Article uri icon


  • Neodymium-doped yttrium garnet (Nd: YAG) is still one of the most popular and commonly used solid-state lasers in existence. To enhance the efficiency of Nd: YAG, it has recently been suggested 111 that iron ions with an absorption band at approximately 260 nm, when doped in Nd: YAG, would allow for the efficient utilization of ultraviolet radiation; the proposed mechanism involves iron to neodymium non-radiative energy transfer. In this note, we wish to consider the possibility that a more complicated process may be occurring. The absorption spectrum of lightly doped iron-doped YAG has been studied in several papers 12 to 61. A charge transfer band exists at approximately 255 nm (Fig. 1); in more heavily doped crystals, additional absorption bands occur at longer wavelengths due to either internal transitions on the iron ions or iron-toiron charge transfer processes 161. The …

publication date

  • January 1, 1990