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- W2461755907 abstract "The double phase conjugate mirror1 (DPCM) is a unique photorefractive device in which two mutually incoherent input beams become phase conjugates of each other. Recently, we have developed a model that simulates the temporal and spatial behavior of (DPCM).2 We have found that the conjugation fidelity as a function of gain exhibits a threshold (gain-threshold). Here, using the same model, we investigate the behavior of DPCM for gain values around the threshold. We find that varying the noise (amplitude and phase), does not affect the threshold value nor does it change the steady state characteristics (reflectivity, fidelity) of DPCM above the threshold. We find that the time response of the system tends to increase with decreasing gain, and reaches a maximum near the threshold. We also find that input-beam intensity ratios other than unity result in asymmetric conjugation process where the thresholds of the two beams differ. We find that DPCM behaves like an oscillator above the threshold, but evolves continuously from an amplifier. Finally, we find that the threshold strongly depends on the phase profiles of the two beams. These results provide a deeper insight into the stimulated wave mixing process, and will be useful for understanding the limitations of device applications, as proposed by many authors." @default.
- W2461755907 created "2016-07-22" @default.
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- W2461755907 date "1994-05-08" @default.
- W2461755907 modified "2023-09-23" @default.
- W2461755907 title "Gain-threshold and oseilSafion in photorefractive double phase conjugate mirrors" @default.
- W2461755907 hasPublicationYear "1994" @default.
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