Ce:Fe:LiNbO_3 Photorefractive Crystal: Material Properties and Applications

摘要

A specially doped photorefractive (PR) crystal Ce:Fe:LiNbO_3, and the effect due to Ce and Fe dopants are reported. We have found that the double-doped crystal exhibits higher PR sensitivity, larger dynamic range, broader spectral bandwidth, and lower scattering noise. It is about 10-litnes higher in PR sensitivity in the red light region (633nm), as compared with the reported data [1]. We have also discovered anomalous enhancement of PR effects which occur at 57℃, 70℃ and 110℃. The anomalies are primarily due to possible structural phase-transitions of the crystal at these temperatures. Several applications of this specially doped PR (Ce:Fe:LiNbO_3) crystal (both bulk and fiber) are also provided.