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Temporal fluctuation in photorefractive wave mixing

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2 Author(s)
Ping Xie ; Div. of Electron. & Inf. Eng., Hokkaido Univ., Sapporo, Japan ; Mishima, T.

We analyzed the physical origin of the temporal fluctuation of the photorefractive space-charge field, and found that fluctuation mainly results from fluctuations in the free-charge-carrier density which is, in turn, due to the very small fluctuations of the input total intensity and the thermal excitation. We studied the influence of various externally-controlled parameters such as the grating wave vector, the applied electric field, and the moving velocity of the grating on the fluctuation of the photorefractive space-charge field. We present experimental results for temporal fluctuations in photorefractive BaTiO 3:Ce two-wave mixing and in BaTiO3 self-pumped phase conjugation. The experimental results show agreement with the theoretical result

Published in:

Quantum Electronics, IEEE Journal of  (Volume:37 ,  Issue: 11 )