| Presentation | 2019-03-08 [Invited Talk] Non-interferometric detection of signal beam with spatial quadrature amplitude modulation in holographic memory Masatoshi Bunsen, Shosei Tateyama, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(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) |
| Keyword(in English) | Holographic memory / Spatial Quadrature Amplitude Modulation / Transport of Intensity Equation |
| Paper # | MRIS2018-28 |
| Date of Issue | 2019-03-01 (MRIS) |
| Conference Information | |
| Committee | MRIS / IEE-MAG |
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| Conference Date | 2019/3/8(1days) |
| 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. |
| Chair | Satoshi Matsunuma(Maxell) / 山口 正洋(東北大) |
| Vice Chair | |
| Secretary | (Toshiba) / (Kinki Univ.) |
| Assistant | Ikuya Tagawa(Tohoku Inst. of Tech.) / Hiroko Arai(AIST) |
| Paper Information | |
| Registration To | Technical Committee on Magnetic Recording & Information Storage / Technical Meeting on Magnetics |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Invited Talk] 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 |
| 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.) |
| Date | 2019-03-08 |
| Paper # | MRIS2018-28 |
| Volume (vol) | vol.118 |
| Number (no) | MRIS-490 |
| Page | pp.pp.17-22(MRIS), |
| #Pages | 6 |
| Date of Issue | 2019-03-01 (MRIS) |