J-GLOBAL         Last updated: Jul 2, 2019 at 02:42
Gifu University
Faculty of Education


Research on rewritable holographic memory/Development of high-speedfull motion simulator for holographic memory

Research Areas


Awards & Honors

Apr 2004
Optics in Computing 2004 : Poster Award, European Optical Society

Published Papers

Hisatoshi Funakoshi, Atsushi Okamoto and Kunihiro Sato
Journal of Modern Optics   52(11) 1511-1527   Jul 2005
Hisatoshi Funakoshi and Atsushi Okamoto
Optics and Laser Technology   38 604-613   Jun 2006
Atsushi Okamoto, Akifumi Mita, Hisatoshi Funakoshi, Kiyoshi Moritake, Takayuki Sano
Journal of Modern Optics   54(4) 599-609   Mar 2007
Terumasa Ito, Atsushi Okamoto, Hisatoshi Funakoshi and Kunihiro Sato
Applied Optics   46(13) 2443-2452   May 2007
Japanese Journal of Applied Physics   52 09LD03   Sep 2013


Atsushi Shibukawa, Atsushi Okamoto, Yuta Wakayama, Akihisa Tomita, Hisatoshi Funakoshi, Kunihiro Sato
Japanese Journal of Applied Physics   52 
To suppress interpage crosstalk that strongly restricts holographic data storage capacity, a digital image diffusion technique was proposed. In this technique, signal and crosstalk components are separated from the propagation angle difference pro...
Akifumi Mita, Akifumi Mita, Atsushi Okamoto, Hisatoshi Funakoshi
Proceedings of SPIE - The International Society for Optical Engineering   5362 61-68
Two-wave encryption method has the feature that the output data are transformed into white-noise data with extremely low intensity in the retrieving process with the incorrect key. In this method, the random phase mask on the input plane plays imp...
Mitsuru Toishi, Atsushi Okamoto, Kunihiro Sato, Hisatoshi Funakoshi
Proceedings of SPIE - The International Society for Optical Engineering   4598 200-207   Dec 2001
In this report, we study the automatic data duplication function in an all-optical fault tolerant holographic memory with two photorefractive crystals. In this memory, when a partial data are dropout, the dropout event is detected and the dropout ...
H. Funakoshi, A. Okamoto, K. Sato
International Conference on Transparent Optical Networks   1 291-294
© 2003 IEEE. We propose a dynamic refreshing technique in a photorefractive memory with double mutually pumped phase conjugate mirrors. Long-term continuous readout without any fixing technique can be achieved by the high quality image refreshing ...
Hisatoshi Funakoshi, Atsushi Okamoto
Optics and Laser Technology   38(8) 604-613
We demonstrate long-term readout of a binarized image with a dynamic refreshment technique by mutually pumped phase conjugate mirrors (MPPCMs). Long-term continuous readout without any fixing technique can be achieved by the refreshment with image...

Conference Activities & Talks

High Resolution Image Restoration for Holographic Memory Using Super-resolution Technique
Oct 2012   
Shift Selectivity Evaluation in Collinear Holographic Memory Using High-Speed Full Motion Simulator with GPU Acceleration
Oct 2012   
Interpage crosstalk suppression by spatial spectrum diffusion and digital phase conjugate reconstruction
Nov 2012   
Sep 2014   

Association Memberships


Research Grants & Projects

Japan Society for the Promotion of Science: Grants-in-Aid for Scientific Research
Project Year: 2014 - 2015