Abstract

Many studies have been performed to clarify the mechanism of the anomalous optical properties of ion doped glasses. In the recent study of the accumulated photon echo experiments, we have shown that the temperature dependence of the homogeneous widths Γ_h's of the ⁵D₀ - ⁷F₀ transition of Eu³⁺ in pure silicate glass at low temperatures can be explained by the TLS dephasing process and the Raman process with low-frequency modes.¹ These two dephasing mechanisms are considered to be relevant to the dephasing of ion doped inorganic glasses since the thermally non-equilibrium nature and the low-frequency modes are peculiar to inorganic glasses. Here arises a question if Γ_h's of transitions of guest ions in inorganic glasses at low temperatures are always governed by these two dephasing mechanisms.

© 1995 IEEE