Spectral hole burning in Sm2+-doped alkaliborate glasses and Tb3+-doped silicate and borate glasses

Temperature and pressure dependence of the homogeneous width of 7F0–5D0 electronic transition in Sm2+-doped sodium borate glass

“…The details of the sample preparation and optical properties of this glass have been reported earlier [3,4]. The sample was mounted in an ordinary T-controlled (5-300 K) liquid-helium cryostat for measurements at normal P or in a pressure cell placed inside a special T-controlled (down to 4.7 K) liquidhelium cryostat for measurements at high hydrostatic P. In that case we used our high-P low-T system [5], employing compressed gaseous or solidified helium as the P-transmitting medium.…”

Persistent spectral hole burning and nonselective photoionisation of Sm 2+ in borate and borosilicate glasses

“…1). This nonexponentiality is not related to the distribution of laser intensity in the focus spot because performing SHB with the same setup in a glass of similar composition doped with Tb 3+ revealed single-photon kinetics which can fairly well be approximated with an exponential function [7]. Time, sec…”

Spectral diffusion broadening by soft local modes in Sm2+-doped sodium borate glass

“…The observed different mechanism for optical dephasing in Sm 2+ -and Eu 3+ -doped borate glasses could be related to different local structures of the reduced and non-reduced rare earth ions [16]. In the case of Sm 2+ -doped glass, oxygen around the rare earth ion is removed during a remelting process in reducing atmosphere [17], which causes strong reduction of the force constants around the impurity. This situation of local softening is very similar to the impurity-induced pseudolocal modes in crystals, where very sharp resonances in the DOS of phonons can be observed [18].…”