Design of the optical channel of an archival holographic memory

An analysis is made of the transfer of data from an input array with transparent and opaque windows to a photodetector array at the exit from a holographic memory. Allowance is made for the shape of the reference and reconstructing beams, aberration of the optical system, and possible errors in the addressing of subholograms. It is shown that a suitable selection of the free parameters of the optical system can ensure a sufficiently strong signal and weak crosstalk noise, which is equivalent to ensuring a high reliability of this holographic memory variant. The attainable data density is 2 Mbit/cm².