Influence of alternating field frequency on enhanced photorefractive gain in two-beam coupling.
We derive an analytic expression describing the intensity and field frequency dependence of photorefractive gain in two-beam coupling under an alternating square-wave electric field. We determine the frequency and intensity ranges over which the gain is maximum and time independent. Experimental results for Bi(12)GeO(20) crystals are presented.
Besson
C
C
Jonathan
J M
JM
Villing
A
A
Pauliat
G
G
Roosen
G
G