Two-center recording in LiNbO_3:Fe:Ru and LiNbO_3:Ce:Ru crystals

摘要

In this paper, the two-center recording with 633nm recording and 465nm sensitizing is performed in doubly-doped LiNbO_3:Fe:Ru and LiNbO_3:Ce:Ru crystals, respectively. The investigation for transmission spectra shows that the better transmission can be found from 400nm to 700nm in LiNbO_3:Ce:Ru crystals. Performance measures, such as diffraction efficiency, recording sensitivity, are calculated and compared according to the time evolution curves of diffraction efficiency. The results show that the high recording sensitivity and dynamic range can be obtained in LiNbO_3:Fe:Ru crystal. The scattering noise in LiNbO_3:Ce:Ru and LiNbO_3:Fe:Ru is investigated, the results show that the lower noise can be observed in LiNbO_3:Ce:Ru crystal.