OKAMOTO Atsushi

J-GLOBAL         Last updated: Dec 20, 2018 at 16:16
 
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Name
OKAMOTO Atsushi
URL
http://optpia.ist.hokudai.ac.jp/
Affiliation
Hokkaido University
Section
Graduate School of Information Science and Technology, Division of Electronics for Informatics, Advanced Electronics
Job title
Associate Professor
Degree
Doctor of Engineering(Hokkaido University)

Research Areas

 
 

Awards & Honors

 
Nov 2012
Interpage crosstalk suppression by spatial spectrum diffusion and digital phase conjugate reconstruction, Outstanding Student Paper Award, IWH2012
Winner: Atsushi Shibukawa, Atsushi Okamoto, Yuta Wakayama, Akihisa Tomita, Hisatoshi Funakoshi, Kunihiro Sato
 
2006
ISOM Excessent Student Award
 
2005
Best Paper Award
 
2001
General Research Award
 
Oct 2012
38-Level Spatial Quadrature-Amplitude Modulation Recording with Double-Referential Holography, ISOM2012 Best Student Paper Award
Winner: Keisuke Zukeran, Atsushi Okamoto, Masanori Takabayashi, Atsushi Shibukawa, Akihisa Tomita
 

Published Papers

 
Virtual phase conjugation based optical tomography for single-shot three-dimensional imaging
Yuta Goto, Atsushi Okamoto, Atsushi Shibukawa, Kazuhisa Ogawa, and Akihisa Tomita
Optics Express   26(4) 3779-3790   Feb 2018   [Refereed]
Volume holographic spatial mode demultiplexer with a dual-wavelength method
Shimpei Shimizu, Atsushi Okamoto, Fumiya Mizukawa, Kazuhisa Ogawa, Akihisa Tomita, Taketoshi Takahata, Satoshi Shinada, and Naoya Wada
Applied Optics   57(2) 146-153   Jan 2018   [Refereed]
Selective spatial mode attenuator using phase-intensity-phase modulation toward mode-division multiplexing transmission
Zihan Zhou, Atsushi Okamoto, Shimpei Shimizu, Kazuhisa Ogawa, Akihisa Tomita, Yuta Wakayama, and Takehiro Tsuritani
SPIE Photonics West 2018 (PW2018)   (10561-15)    2018   [Refereed]
Measurement of differential mode delay using reference-free low-coherence digital holography
Shogo Hoshino, Atsushi Okamoto, Yuta Goto, Kazuhisa Ogawa, Akihisa Tomita, Yuta Wakayama, and Takehiro Tsuritani
SPIE Photonics West 2018 (PW2018)   (10561-12)    2018   [Refereed]
Fumiaki Matsuoka, Akihisa Tomita,and Atsushi Okamoto
Physical Review Letters   119(18) 180507-1-180507-4   Nov 2017   [Refereed]
Spatial mode demultiplexing technique using angularly multiplexed volume holograms with a phase plate
Shimpei Shimizu, Atsushi Okamoto, Fumiya Mizukawa, Kazuhisa Ogawa, Akihisa Tomita, Taketoshi Takahata, Satoshi Shinada, and Naoya Wada
Japanese Journal of Applied Physics   56(98) 09NA05-1-09NA05-5   Aug 2017   [Refereed]
Improvement of Conversion Accuracy in Volume Holographic Mode-Demultiplexing Converter Using Shaped Beams
Fumiya Mizukawa, Atsushi Okamoto, Yuta Goto, Shimpei Shimizu, Kazuhisa Ogawa, and Akihisa Tomita
International Workshop on Holography and Related Technologies 2017 (IWH2017)   (P2)    2017   [Refereed]
Design of Complex Amplitude Modulation for Suppressing Optical Loss in Mode Conversion by Considering Radiation Modes
Tomohiro Maeda, Atsushi Okamoto, Kazuhisa Ogawa, and Akihisa Tomita
International Workshop on Holography and Related Technologies 2017 (IWH2017)   (P9)    2017   [Refereed]
Multiplexing and Demultiplexing of Digital Images using Virtual Phase Conjugation for High-Density Holographic Data Storage
Yuta Goto, Atsushi Okamoto, Kazuhisa Ogawa, and Akihisa Tomita
International Workshop on Holography and Related Technologies 2017 (IWH2017)   (P10)    2017   [Refereed]
Shimpei Shimizu, Atsushi Okamoto, Fumiya Mizukawa, Kazuhisa Ogawa, Akihisa Tomita, Taketoshi Takahata, Satoshi Shinada, and Naoya Wada
22nd Microoptics Conference (MOC2017   (P-62)    2017   [Refereed]

Misc

 
Suzuki Takashi, Tomita Akihisa, Okamoto Atushi
Proceedings of the IEICE General Conference   2012    Mar 2012
Nishimaki Kaori, Okamoto Atsushi, Wakayama Yuta, Tomita Akihisa, Takayama Yoshihisa
Technical report of IEICE. SAT   111(336) 137-140   Dec 2011
We propose an innovative acquisition and tracking system using a dynamically reconfigurable optical device for optical inter-satellite communication without growing in size and complications due to directivity control of laser beams. The proposed ...
Wakayama Yuta, Okamoto Atsushi, Tomita Akihisa
Proceedings of the Society Conference of IEICE   2011(2)    Aug 2011
Aoki Kohei, Okamoto Atsushi, Tomita Akihisa, Honma Satoshi
Proceedings of the Society Conference of IEICE   2011(2)    Aug 2011
Soma Daiki, Okamoto Atsushi, Oda Takuya, Tomita Akihisa, Sato Kunihiro
Proceedings of the Society Conference of IEICE   2011(2)    Aug 2011
ODA Takuya, OKAMOTO Atsushi, SOMA Daiki, TOMITA Akihisa
Technical report of IEICE. LQE   111(186) 75-80   Aug 2011
This study aims at the realization of mode division multiplexing (MDM) communication using multi-mode fiber by all-optical mode demultiplexer consisted of the dynamic multiple holograms. In this paper, we consider the separation of three multiplex...
Soma Daiki, Okamoto Atsushi, Oda Takuya, Tomita Akihisa
Proceedings of the IEICE General Conference   2011(2)    Feb 2011
OKAMOTO ATSUSHI, ODA TAKUYA, MORITA KAZUYUKI
Tech Dig Int Conf Opt photonics Des Fabr   7th 169-170   2010   [Refereed]
Wakayama Yuta, Okamoto Atsushi, Grabar Alexander A.
Proceedings of the Society Conference of IEICE   2009(1)    Sep 2009
Journal of Modern Optics   55(15) 2391-2399   Sep 2008
Bunsen Masatoshi, Furuta Hirosuke, Aragane Kuniaki, Okamoto Atsushi
Jpn J Appl Phys   47(7) 5977-5980   Jul 2008
Novel holographic recording configurations capable of selective erasure of multiplexed holograms for data-page rewriting in holographic storage are presented. By using a half wave plate and a polarizing beam splitter as the phase control device of...
Nihei Hiroyuki, Okamoto Atsushi
Jpn J Appl Phys   47(7) 5781-5783   Jul 2008
We demonstrate optical control of an active medium, such as a quantum dot or an impurity atom, embedded in three-dimensional photonic crystals. The optical control provides a very high spectral selectivity, which allows us to control confined ligh...
Journal of Modern Optics   55(2) 311-322   Jan 2008
TAKAHASHI Nobuhiro, OKAMOTO Atsushi, SANO Takayuki, ITO Terumasa
IEICE technical report. EMD   107(196) 133-137   Aug 2007
In order to reduce the replication time of holographic ROMs, we propose a high-speed replication system using a photorefractive amplifier (PRA). Our system enables high-speed replication of holographic ROMs by amplification of rather weak beams di...
YOSHIDA Hirofimi, OKAMOTO Atsushi, HONMA Satoshi
IEICE technical report. EMD   107(196) 139-143   Aug 2007
We propose the suppression method of the crosstalk by the apodization of photorefractive(PR) transmission gratings for wavelength filter. When two coherent writing beams illuminate a PR crystal, an index grating is induced by PR effect and the asy...
Japanese Journal of Applied Physics. Part 1. Regular Papers, Short Notes & Review Papers   46(6B) 3822-3827   Jun 2007
Japanese Journal of Applied Physics. Part 1. Regular Papers, Short Notes & Review Papers   46(6B) 3816-3821   Jun 2007
Japanese Journal of Applied Physics. Part 1. Regular Papers, Short Notes & Review Papers   46(6B) 3858-3861   Jun 2007
Optics & Laser Technology   39(4) 881-884   Jun 2007
Journal of Modern Optics   54(4) 599-609   Mar 2007
Japanese Journal of Applied Physics. Part 1. Regular Papers, Short Notes & Review Papers   45(2B) 1270-1276   Feb 2006

Books etc

 
Systems, Devices and Materials for the Holographic Data Storage
2006   

Conference Activities & Talks

 
Atsushi Okamoto, Atsushi Shibukawa, Akihisa Tomita, and Masanori Takabayashi
International Symposium on Optical Memory 2013   Aug 2013   
A. Okamoto, A. Tomita, K. Kawabata and Y. Wakayama
CLEO-PR & OECC/PS 2013   Jul 2013   
ZUKERAN Keisuke, OKAMOTO Atsushi, TAKABAYASHI Masanori, SHIBUKAWA Atsushi, TOMITA Akihisa
ITE Technical Report   15 Feb 2013   
We propose a double-referential holographic memory (DRHM) that can detect phase modulation signal by just entering reference beam into recording medium without additional system for generation and irradiation of the beam to interfere with signal b...
Holographic Memory System with Spatial Quadrature Amplitude Modulation [Invited]
OKAMOTO Atsushi
Optics and Photonics Japan 2011   Nov 2011   
Okamoto Atsushi, Soma Daiki, Oda Takuya, Tomita Akihisa, Wakayama Yuta
Proceedings of the Society Conference of IEICE   30 Aug 2011   

Patents

 
特開2003-255418
特開2006-343586
特開2007-232919
特開2007-41519
特開2007-43087
特開2007-316152
特許公開2008-97738
特開2008-97738
特許公開2008-287107
特許公開2009-145429
特許公開2009-175591
特開2006-308972
特開2005-309385
特開2005-292792
特許第4285941号
特開2004-37510
特開2004-165966
特許第3811777
特開2005-134659
特開2006-126642
特開2005-189845
特開2005-189844
特開2006-184570
特開2006-208858