Persistent holograms are recorded with green light in LiNbO3 crystals doped with Mn and Fe. The recording sensitivity is 20 times better than that obtained by recording with red light. Partial loss of persistence is caused by using green light for recording.
© 2000 Optical Society of America
(090.2900) Holography : Optical storage materials
Ali Adibi, Karsten Buse, and Demetri Psaltis, "Sensitivity improvement in two-center holographic recording," Opt. Lett. 25, 539-541 (2000)