Title :
Ce:Fe:LiNbO3 photorefractive crystal: material properties and applications
Author :
Yu, F.T.S. ; Bhalla, A.S. ; Yin, S. ; Zhao, F. ; Wu, Z. ; Salerno, D.M.
Author_Institution :
Dept. of Electr. Eng., Pennsylvania State Univ., University Park, PA, USA
Abstract :
A specially doped photorefractive (PR) crystal Ce:Fe:LiNbO3 , 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-times higher in PR sensitivity in the red light region (633 nm), as compared with the reported data. We have also discovered anomalous enhancement of PR effects which occur at 57°C, 70°C and 110°C. 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:LiNbO3) crystal (both bulk and fiber) are also provided
Keywords :
cerium; ferroelectric materials; iron; lithium compounds; optical fibres; optical noise; photorefractive effect; photorefractive materials; solid-state phase transformations; 57 to 110 C; 633 nm; Ce:Fe:LiNbO3 photorefractive crystal; LiNbO3:Ce,Fe; PR sensitivity; anomalies; anomalous enhancement; bulk; doped photorefractive crystal; double-doped crystal; dynamic range; fiber; material properties; red light region; scattering noise; spectral bandwidth; structural phase-transitions; Dynamic range; Laser beams; Material properties; Optical diffraction; Optical recording; Optical refraction; Optical saturation; Optical sensors; Optical variables control; Photorefractive materials;
Conference_Titel :
Applications of Ferroelectrics, 1994.ISAF '94., Proceedings of the Ninth IEEE International Symposium on
Conference_Location :
University Park, PA
Print_ISBN :
0-7803-1847-1
DOI :
10.1109/ISAF.1994.522451
