Tilt Error Measurement and Compensation Method for the Holographic Data Storage System Using Disturbance Observer

Sang Hoon Kim, Jang Hyun Kim, Yonghee Lee, Hyunseok Yang, Joo Youn Park, Kyoung Su Park, Young Pil Park

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Tilt error can affect a serious effect to holographic data storage system using angle(polytopic) multiplexing. Because the tolerance about tilt error is very tight it is important to measure the tilt error and compensate it. In this paper, tilt error measurement system with additional red laser and reflection geometry is suggested and servo control experiments are conducted. A servo controller to compensate tilt error is designed using disturbance observer. Amount of tilt is decreased smaller than 0.01 degree and signal-to-noise ratio is increased with the tilt servo controller when 0.216 degree of tilt disturbance is applied.

Original languageEnglish
Article number4815995
Pages (from-to)2248-2251
Number of pages4
JournalIEEE Transactions on Magnetics
Volume45
Issue number5
DOIs
Publication statusPublished - 2009 May 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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