Global optimization of sensitivity and dynamic range for two-center holographic recording

The performance of two-center holographic recording is theoretically studied and described in detail. We present a systematic method for global optimization of two-center holographic recording. Whereas the method presented is general, we perform optimization for lithium niobate crystals doped with iron and manganese (LiNbO3:Fe:Mn). Both dynamic range (M/#) and sensitivity (S) are considered for global optimization, and the optimum design parameters for LiNbO3:Fe:Mn crystals are predicted. To achieve optimization we use both an analytic approach and a complete numerical approach. The absorption of light in the crystal is also considered. We show that the optimum design parameters for maximizing M/# are different from those for maximizing S. Therefore a trade-off exists between dynamic range and sensitivity. We also describe the complete dependence of S in two-center recording on the design parameters. We show in particular, for the first time to our knowledge, that S depends on the ratio of recording and sensitizing intensities and not on the absolute intensities.

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