High resolution investigation of Nd~(3+) doped strontium lanthanum aluminate

摘要

Strontium lanthanum aluminates crystals (ASL) doped with Nd~(3+) with formula Sr_(1-x)Nd_yLa_(x-y)Mg_xAl_(12-x)O_(19) are interesting crystals for lasers operating in i.r. (～ 900 nm range) or blue spectral ranges. This paper uses high-resolution spectroscopy, at low temperatures, for investigation of the influence of composition and Nd~(3+) doping of ASL crystals on emission properties. Preliminary spectral characteristics of two non-equivalent centers were determined. From these data and their dependence on composition, structural models for the two centers are proposed.