Temporal fluctuation in photorefractive wave mixing

Author

Xie, Ping ; Mishima, Teruhito

Author_Institution

Div. of Electron. & Inf. Eng., Hokkaido Univ., Sapporo, Japan

Volume

37

Issue

11

fYear

2001

fDate

11/1/2001 12:00:00 AM

Firstpage

1388

Lastpage

1395

Abstract

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

Keywords

barium compounds; cerium; fluctuations; multiwave mixing; optical phase conjugation; optical pumping; photorefractive materials; BaTiO₃; BaTiO₃:Ce; applied electric field; externally-controlled parameters; free-charge-carrier density; grating wave vector; input total intensity; moving velocity; photorefractive BaTiO₃:Ce; photorefractive space-charge field; photorefractive wave mixing; physical origin; self-pumped phase conjugation; temporal fluctuation; temporal fluctuations; thermal excitation; very small fluctuations; Fluctuations; Gratings; Helium; Impurities; Nonlinear optics; Optical materials; Optical mixing; Photorefractive effect; Photorefractive materials; Physics;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.958352

Filename

958352