Tracking servo method for the gap servo near field optical storage systems

Jeong-Kyo Seo; Jeong Uk Lee; Yun Sup Shin; Jin-Moo Park; In Ho Choi; Byung-Hoon Min

doi:10.1117/12.685173

22 June 2006 Tracking servo method for the gap servo near field optical storage systems

Jeong-Kyo Seo, Jeong Uk Lee, Yun Sup Shin, Jin-Moo Park, In Ho Choi, Byung-Hoon Min

Author Affiliations +

Proceedings Volume 6282, Optical Data Storage 2006; 62820E (2006) https://doi.org/10.1117/12.685173
Event: Optical Data Storage 2006, 2006, Montréal, Canada

Abstract

Gap servo systems based on one of near field technologies are generally using the 1-beam push pull method to generate servo signal and this causes the optical DC offset problem in servo signal. In this paper, we presented new method of track error generation using the proposed GELP signal for the gap servo near field optical storage systems. By using the GELP signal and 2-divided photo-detector for the gap error signal detection, test result shows the optical DC offset in track error signal generated from lens movement could be eliminated.

Citation Download Citation

Jeong-Kyo Seo, Jeong Uk Lee, Yun Sup Shin, Jin-Moo Park, In Ho Choi, and Byung-Hoon Min "Tracking servo method for the gap servo near field optical storage systems", Proc. SPIE 6282, Optical Data Storage 2006, 62820E (22 June 2006); https://doi.org/10.1117/12.685173

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