Temporal fluctuation in photorefractive wave mixing

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 exc...

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Bibliographic Details
Published in:IEEE journal of quantum electronics 2001-11, Vol.37 (11), p.1388-1395
Main Authors: Ping Xie, Mishima, T.
Format: Article
Language:English
Subjects:
Barium titanates
Density
Exact sciences and technology
Fluctuation
Fluctuations
Fundamental areas of phenomenology (including applications)
Gratings
Helium
Impurities
Nonlinear optics
Optical materials
Optical mixing
Optics
Origins
Phase conjugation
Phase conjugation, optical mixing, and photorefractive effect
Phase conjugation, optical mixing
photorefractive and kerr effects
Photorefractive effect
Photorefractive materials
Physics
Quantum electronics
Temporal logic
Two-wave mixing
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Summary: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/sub 3/:Ce two-wave mixing and in BaTiO/sub 3/ self-pumped phase conjugation. The experimental results show agreement with the theoretical result.
ISSN:0018-9197
1558-1713
DOI:10.1109/3.958352