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Proceedings Paper

A novel design of tracking servo for hybrid recording
Author(s): Haiwei Wang; Youxin Xia; Xiandeng Pei
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Paper Abstract

Hybrid recording is one of the most promising candidates to breaking down the technical barrels of the extremely high density recording. To acquire the goal, the recording grains must get much smaller than ever before, and at the same time, the track pitch must also decrease from ~200nm to ~70nm. Thus the design margin for the tracking servo shrinks dramatically. This paper tries to answer questions like these: is the existing scheme still work on the conditions of the hybrid recording? If not, what are the key elements of the novel one? How to design such a fine servo system? The main concern of designing a servo system is relevant to several key factors, such as recording density; mechanics; signal to noise ratio. Some parameters should be assumed. This paper anticipates the requirements of the hybrid recording, and some assumptions (including recording density, mechanical characteristics, SNR, etc) have been made. Then, the requirements that the servo system should be met can be calculated. Results show that a novel tracking servo system should be designed. Finally a novel servo scheme is presented.

Paper Details

Date Published: 15 September 2005
PDF: 4 pages
Proc. SPIE 5966, Seventh International Symposium on Optical Storage (ISOS 2005), 59660H (15 September 2005); doi: 10.1117/12.649613
Show Author Affiliations
Haiwei Wang, Huazhong Univ. of Science and Technology (China)
Youxin Xia, Huazhong Univ. of Science and Technology (China)
Xiandeng Pei, Huazhong Univ. of Science and Technology (China)

Published in SPIE Proceedings Vol. 5966:
Seventh International Symposium on Optical Storage (ISOS 2005)
Fuxi Gan; Lisong Hou, Editor(s)

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