Vk. Tikhomirov et al., PHOTOINDUCED ANISOTROPY AND PHOTOREFRACTION IN PR-DOPED GE-GA-S GLASSES, Journal of non-crystalline solids, 213, 1997, pp. 174-178
Metastable photoinduced anisotropy and photorefraction are reported in
Pr3+-doped Ge-Ga-S glasses which are promising materials for optical
fiber amplifiers. Microscopic models for these effects are suggested a
nd their combination with the laser effect in Pr3+ dopants is proposed
.