Servo study of radially polarized beam in high numerical aperture optical data storage system

Tzu Hsiang Lan*, Chung-Hao Tien

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

In this paper, we employed full vector diffraction treatment to study the dependence of the servo signals to the doughnut-shaped focus radiation of radial polarization, which provides a smaller spot size than linear polarization, and the resistance to the primary aberrations in a numerical aperture (NA) = 1.0 optical data storage system. Compared with linear polarization, at strong focusing, a radially polarized beam leads to 14% asymmetry reduction in the linear range of the focus-error signal (FES) curve and to at least 56% variation reduction in crosstalk in a weakly aberrated system. These characteristics make radial polarization a potential candidate for next-generation high-density optical systems.

Original languageEnglish
Pages (from-to)3758-3760
Number of pages3
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume46
Issue number6 B
DOIs
StatePublished - 22 Jun 2007

Keywords

  • Focus-error signal
  • High NA
  • Optical data storage system
  • Radially polarized beam
  • Tracking-error signal

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