Y. Lu et al., Study of the four-wave mixing diffraction efficiency of longitudinal-fieldmultiple-quantum-well photorefractive device grown at low temperature, CHIN PHYS, 10(2), 2001, pp. 121-123
We investigate the relationship between the beam intensity and the four-wav
e mixing diffraction efficiency of the longitudinal-field multiple-quantum-
well (LMQW) photorefractive device grown at low temperature. A optimum beam
intensity is found. We also explain the different mechanisms of the beam i
ntensity effect on the diffraction efficiency of the LMQW device and the tr
ansverse-field MQW device. Some advice on how to improve the diffraction ef
ficiency is given.