Enhancement of Er3+ luminescence in LiNbO3 : Mg crystals

The luminescent properties of Er3+ ions in LiNbO3:Er and LiNbO3:Mg,Er cryst als at room temperature have been investigated by the emission spectra and the selective excitation spectra. The energy transition processes of Er3+ l uminescence have been analysed. It has been found that the luminescent inte nsity of Er3+ ions in the LiNbO3:Mg,Er crystal increased up to 7.8 times co mpared with that in the LiNbO3:Er crystal. The decrease of the defect centr e (Nb-Li) concentration due to doping with Mg2+ ions plays a key role in th is phenomenon.