PERSISTENT SPECTRAL HOLE-BURNING IN EU3-DOPED ALUMINOSILICATE GLASS AT HIGH-TEMPERATURE()

Persistent spectral hole burning at temperatures up to 200 K was first time observed in Eu3+-ion-doped aluminosilicate glass. Glass having a composition of 2-wt.% Eu2O3-containing Al2O3 . 9SiO(2) was prepared b y heating the gel synthesized from metal alkoxides at 900 degrees C. T he persistent spectral holes were burned in the F-7(0) --> D-5(0) line of the Eu3+ ions by a dye laser with a bandwidth of similar to 1 cm(- 1), of which width and depth were similar to 3 cm(-1) and similar to 1 0% of the total fluorescence intensity, respectively, at 77 K. It was found that the hole depth decreased with increasing temperature and wa s erased above 220 K. The local environment of the Eu3+ ions in glass is discussed with regard to the fluorescence line narrowing spectra of the D-5(0) --> F-7(1) transition. (C) 1998 Optical Society of America .