Regular paper

[OPTICAL REVIEW Vol. 17, No. 1 (2010) 10-13]
© 2010 The Japan Society of Applied Physics

Radial Tilt Compensation Method of Holographic Disk Drive

Nakyoung KIM^1,3, Pilsang YOON^1,2*, Kunyul KIM¹, Gwitae PARK², and Hyunseok YANG³

¹Digital Media Laboratory, Daewoo Electronics Corporation, 543 Dangjeong, Gunpo, Gyeonggi 435-733, Korea
²Department of Electrical Engineering, Korea University, 5-1 Anam, Sungbuk, Seoul 136-701, Korea
³Center for Information Storage Device, Yonsei University, 262 Seongsanno, Seodaemun, Seoul 120-749, Korea

(Received January 15, 2009; Revised July 21, 2009; Accepted October 30, 2009)

Bragg angle mismatch by tangential and radial tilts is a critical problem in holographic digital data storage. Generally, tangential tilt can be easily compensated for in holographic digital data storage. However, radial tilt is not easily compensated for. In this paper, we propose a new method of radial tilt compensation. The proposed method can compensate for Bragg angle mismatch caused by radial tilt.

Key words: holographic data storage, angle multiplexing, radial tilt, tilt compensation

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