COMPOSITIONAL DEPENDENCE OF ABSORPTION AND FLUORESCENCE OF YB3+ IN OXIDE GLASSES

The integrated absorption cross section, the spontaneous emission prob ability, and the stimulated emission cross section of Yb3+ were determ ined in silicate, phosphate, berate, germanate, aluminate, gallate, an d ZBLAN host glasses, The compositional dependence of the stimulated e mission cross section of the F-2(5/2) --> F-2(7/2) transition is deter mined mainly by the integrated absorption cross section in the glasses . A peak stimulated emission cross section above 1 pm(2), which is the highest value in glasses, was obtained in a gallate glass with a comp osition of 40K(2)O . 20Ta(2)O(5) . 40Ga(2)O(3). The factors affecting the integrated absorption cross section are discussed using the Judd-O felt parameters of Er3+ calculated in previous studies.