Abstract

Long-lived or persistent spectral hole-burning has been observed in many rare-earth doped glasses and crystals [1]. In Eu³⁺ doped solids, hole-burning due to optical pumping of nuclear quadrupole levels has been observed. In Pr³⁺ doped solids, local ion rearrangement around Pr³⁺ often causes hole-burning. Macfarlane and co-workers have reported persistent spectral hole-burning in SrF₂: Pr³⁺ and CaF₂: Pr³⁺ [2, 3]. They have concluded that the light-induced D⁻ ion motion causes the hole burning. In contrast with organic materials, such proton related hole-burning has not been reported so much in inorganic solids.

© 1994 Optical Society of America