Storage capacity and cross talk in angularly multiplexed holograms: two case studies

Storage capacity of a volume is derived based on the space-bandwidth products of angularly multiplexedholograms and by considering their diffraction efficiency and cross-talk limitations. An erasable medium of Fe:LiNbO(3) (10MM × 1mm × 2mm) is simulated thatyieldsacapacity of ˜ 26 Gbits for 95 holograms, each with an efficiency of ~ 10(-4), for a total of ~ -31-dB cross talk. The recording time is estimated at 0.7 s (assuming 10(3) W/m(2) and λ = 0.5 µm). A nonerasable dichromated gelatin medium 10 mm × 10 mm × 0.025 mm is also analyzed that yields a capacity of ~ 3.3 Gbits for 11 holograms with efficiency of 0.09 and ~ -25-dB cross talk.