In normal angular multiplexed holographic storage system, to make the system compact, replacing the Ar⁺ laser with the diode-pumped solid-state laser (DPL) is an important means, but the application of DPL will increase the cross-talk and reduce the storage density because of the multiple longitudinal modes in the output of the DPL. In this paper, a novel speckle holographic storage scheme is proposed, in which a random phase diffuser is added in the front of storage medium along the reference optical path of the 90° geometry. A theoretical model has been derived to describe the storage properties of this scheme based on the cross-correlation of dynamic speckle and the diffractive theory. The angular selectivity in the normal angular multiplexed system and in the speckle-coded angular multiplexed system have been theoretically compared and experimentally confirmed. The results indicate that this scheme allows an increase of storage density with a simple modification in the DPL system.

Date Published: 17 September 2002
PDF: 3 pages
Proc. SPIE 4930, Advanced Optical Storage Technology, (17 September 2002); doi: 10.1117/12.483343

Published in SPIE Proceedings Vol. 4930:
Advanced Optical Storage Technology
Duanyi Xu; Seiya Ogawa, Editor(s)