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| Presentation | 2019-03-08 11:45 [Invited Talk] Non-interferometric detection of signal beam with spatial quadrature amplitude modulation in holographic memory Masatoshi Bunsen (Fukuoka Univ.), Shosei Tateyama (Graduate School of Engineering, Fukuoka Univ.)  MRIS2018-28 Link to ES Tech. Rep. Archives: MRIS2018-28 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In recent years, Spatial Quadrature Amplitude Modulation (SQAM) is actively studied in order to increase storage density and capacity of holographic memory. In order to detect SQAM signal beam, it is necessary to acquire both spatial intensity and phase distributions of the signal beam, and interferometric methods such as the phase-shift method are generally employed. Although the complex amplitude distribution of the signal beam can be acquired precisely by the interferometry, there are several issues such as enlarged and complicated optical system and deterioration of vibration tolerance. In this paper, we focus on detection method of complex amplitude distribution of signal beam without interferometric techniques, especially the transport of intensity equation method, and examine application of this method to holographic memory. By numerical simulations and optical experiments, we reveal detection accuracy of SQAM signal beam when using this method. We also discuss conditions of phase distribution of SQAM signal beam required for accurate phase detection, and methods of reducing noise frequently appearing in the detected phase distribution. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Holographic memory / Spatial Quadrature Amplitude Modulation / Transport of Intensity Equation / / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 118, no. 490, MRIS2018-28, pp. 17-22, March 2019. | |
| Paper # | MRIS2018-28 | |
| Date of Issue | 2019-03-01 (MRIS) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | MRIS2018-28 Link to ES Tech. Rep. Archives: MRIS2018-28 |
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| Conference Information | |
| Committee | MRIS IEE-MAG |
| Conference Date | 2019-03-08 - 2019-03-08 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Nagoya Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Optical Recording, Magnetic Recording, etc. |
| Paper Information | |
| Registration To | MRIS |
| Conference Code | 2019-03-MRIS-MAG |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Non-interferometric detection of signal beam with spatial quadrature amplitude modulation in holographic memory |
| Sub Title (in English) | |
| Keyword(1) | Holographic memory |
| Keyword(2) | Spatial Quadrature Amplitude Modulation |
| Keyword(3) | Transport of Intensity Equation |
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| 1st Author's Name | Masatoshi Bunsen |
| 1st Author's Affiliation | Fukuoka University (Fukuoka Univ.) |
| 2nd Author's Name | Shosei Tateyama |
| 2nd Author's Affiliation | Graduate School of Engineering, Fukuoka University (Graduate School of Engineering, Fukuoka Univ.) |
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| Speaker | Author-1 |
| Date Time | 2019-03-08 11:45:00 |
| Presentation Time | 45 minutes |
| Registration for | MRIS |
| Paper # | MRIS2018-28 |
| Volume (vol) | vol.118 |
| Number (no) | no.490 |
| Page | pp.17-22 |
| #Pages | 6 |
| Date of Issue | 2019-03-01 (MRIS) |
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