Abstract

Materials of M_yM’_1-yFCl_xBr_1-x:Sm²⁺ have been widely applied in spectral hole-burning since the first observation of persistent spectral hole-burning in BaFCl:Sm²⁺ at 2K was reported by A. Winnaker, etc. in 1985^[1]. From then on, hole-burning in BaFCl_0.5Br_0.5:Sm²⁺ at 77K^[2] in SrFCl and Mg_0.5Sr_0.5FCl_0.5Br_0.5:Sm²⁺ at room temperature^{[3, 4]} were reported. Room temperature hole-buring of Sm²⁺ in fluorohafnate glasses^[5,6] were reported in recent years also. These materials are of potential use in high temperature hole- burning. But comparing to organic materials, they have lower hole- burning efficiency and narrower inhomogenous line width. In order to apply spetral hole- buring in frequency domain optical storage, it is important to improve these materials.

© 1994 Optical Society of America