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Paper Abstract and Keywords
Presentation 2020-02-28 13:45
Reproduction of SQAM signal for holographic memory and Estimation of recording density
Satoshi Honma, Haruki Funakoshi (Yamanashi Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) Recording scheme of Spatial quadrature amplitude modulation (SQAM) signal whose amplitude and phase are individually modulated to multi-level in holographic memory is promising method to improve recording capacity of the memory. We have proposed two exposure method (TEM) in which the two holograms for different phase modulated signal is multiplex recorded in the same position and it synthesize the hologram for SQAM signal. Furthermore, we have design an interleaved phase pattern from the above two phase-codes and applied the pattern to recording holographic data of SQAM signal. In this report, we analyze the exposure region of the recording beams with respected to the resolution of the SQAM signal and estimate the effective recording density of the holographic memory using the interleaved phase method.
Keyword (in Japanese) (See Japanese page) 
(in English) Holographic memories / Two-exposure method / Spatial quadrature amplitude modulation signal / / / / /  
Reference Info. ITE Tech. Rep., vol. 44, no. 6, MMS2020-33, pp. 283-288, Feb. 2020.
Paper # MMS2020-33 
Date of Issue 2020-02-20 (MMS, HI, ME, AIT) 
ISSN Print edition: ISSN 1342-6893    Online edition: ISSN 2424-1970
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Conference Information
Conference Date 2020-02-27 - 2020-02-28 
Place (in Japanese) (See Japanese page) 
Place (in English) Hokkaido Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Image Processing, etc. 
Paper Information
Registration To MMS 
Conference Code 2020-02-HI-IE-ITS-MMS-ME-AIT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Reproduction of SQAM signal for holographic memory and Estimation of recording density 
Sub Title (in English)  
Keyword(1) Holographic memories  
Keyword(2) Two-exposure method  
Keyword(3) Spatial quadrature amplitude modulation signal  
1st Author's Name Satoshi Honma  
1st Author's Affiliation Yamanashi University (Yamanashi Univ.)
2nd Author's Name Haruki Funakoshi  
2nd Author's Affiliation Yamanashi University (Yamanashi Univ.)
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Speaker Author-1 
Date Time 2020-02-28 13:45:00 
Presentation Time 15 minutes 
Registration for MMS 
Paper # MMS2020-33, HI2020-33, ME2020-61, AIT2020-33 
Volume (vol) vol.44 
Number (no) no.6 
Page pp.283-288 
Date of Issue 2020-02-20 (MMS, HI, ME, AIT) 

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