Applications of diffuser for volume holographic memory and correlator

Guofan Jin; Liangcai Cao; Qingsheng He

doi:10.1117/12.667715

20 January 2006 Applications of diffuser for volume holographic memory and correlator

Guofan Jin, Liangcai Cao, Qingsheng He

Proceedings Volume 6027, ICO20: Optical Information Processing; 60270A (2006) https://doi.org/10.1117/12.667715
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China

Abstract

Correlation selectivity of the speckle encoding method with a diffuser in the reference beam or the object beam for volume holographic storage system is analyzed. Unlike Bragg selectivity, correlation selectivity has no sidelobes and does not depend on the thickness of the recording medium. Thus the intrapage crosstalk can be greatly suppressed. For a volume holographic memory, the reference beam is modulated with the diffuser, which can sharpen the diffraction efficiency curve (versus the angular deviation). It helps increase the storage density and improve the quality of the reconstructions. For a volume holographic correlator, the signal beam is modulated with the diffuser, which can sharpen the correlation peak and suppress the correlation sidelobes. It helps improve the parallelism and accuracy of the holographic correlator. It is shown that the diffuser techniques are effective and feasible to improve the performance of the volume holographic storage and correlation system.

Citation Download Citation

Guofan Jin, Liangcai Cao, and Qingsheng He "Applications of diffuser for volume holographic memory and correlator", Proc. SPIE 6027, ICO20: Optical Information Processing, 60270A (20 January 2006); https://doi.org/10.1117/12.667715

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