Title :
An experimental and theoretical study of spatial subharmonics in a photorefractive Bi12GeO20 crystal induced by DC field and moving grating technique
Author :
Richter, I. ; Grunnet-Jepsen, A. ; Takacs, J. ; Solymar, L.
Author_Institution :
Dept. of Eng. Sci., Oxford Univ., UK
fDate :
7/1/1994 12:00:00 AM
Abstract :
The generation of spatial K/2 subharmonics is reported for the first time to our knowledge in a photorefractive BGO crystal. The subharmonic instability regions in the applied dc field versus frequency detuning plane were measured for different interbeam angles and different modulations of the interference pattern. The theory presented takes into account both the modulation of the interference pattern and the presence of the fundamental space-charge field. There is good qualitative agreement between theoretical prediction and experimental results
Keywords :
bismuth compounds; diffraction gratings; electro-optical effects; optical harmonic generation; photorefractive materials; space charge; Bi12GeO20; DC field; frequency detuning; interbeam angles; interference pattern modulation; moving grating; photorefractive BGO crystal; space-charge field; spatial subharmonics; subharmonic instability; Bismuth; DC generators; Differential equations; Electric fields; Frequency measurement; Gratings; Interference; Nonlinear equations; Photorefractive effect; Photorefractive materials;
Journal_Title :
Quantum Electronics, IEEE Journal of
