Suppression and Utilization of Inter-Pixel Crosstalk Noise in Holographic Data Storage Systems

We report on two methods of designing the input signal images for controlling or exploiting crosstalk noise in holographic data storage systems.The first is a phase detection method using crosstalk noise.By placing phase-known pixels in the signal patterns, the signal phase can be extracted by a single image acquisition without requiring multi-step interferometric measurements.The other method suppresses and controls crosstalk noise in intensity-modulated multivalued signals.By appropriately designing the signal patterns, the intensity modulation owing to the interference with noise diffracted light can be significantly reduced.The signal detection error rates in these methods were evaluated using our holographic simulator, and the effectiveness of our proposed methods was discussed in terms of recording density.