We compare the system performances of two holographic recording geometries using iron-doped lithium niobate: the 90-degree and transmission geometry. We find that transmission geometry is better because the attainable dynamic range (M/#) is much higher. The only drawback of transmission geometry is the buildup of fanning, particularly during readout. Material solutions that reduce fanning such as doubly-doped photorefractive crystals make transmission geometry the clear winner.
© 2003 Optical Society of America
(090.7330) Holography : Volume gratings
(160.2900) Materials : Optical storage materials
(210.0210) Optical data storage : Optical data storage
(210.2860) Optical data storage : Holographic and volume memories
Yunping Yang, Ali Adibi, and Demetri Psaltis, "Comparison of Transmission and the 90-Degree Holographic Recording Geometry," Appl. Opt. 42, 3418-3427 (2003)