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Proceedings Paper

Super-resolution optical mastering system using blue laser and high-numeric-aperture lens
Author(s): Xiaodong Fan; Duanyi Xu; Guosheng Qi; Peijun Jiang; Kun Qian
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Paper Abstract

A practical mastering technology was developed using a blue laser optical mastering system with a wavelength of 405 nm, a numeric aperture (NA) of 0.95 and a phase-shift apodizer. The laser is shaped and collimated by a space filter with its diameter 2μm, then is split into two beams by polarizing prism. One beam is used to detection of the optical power, and the other beam is used to write data on the disc. The phase-shift mask is lay between the collimating lens and the polarizing prism to optimizing the intensity distribution of Airy point on the disc. The lens with high NA 0.95 is designed to make the image point of the laser less then the diffraction point. The air-operated focus control device is used to focalize the light on the disc. Based on the technology, the recording spot with its diameter about 223nm is achieved.

Paper Details

Date Published: 3 January 2005
PDF: 5 pages
Proc. SPIE 5643, Advances in Optical Data Storage Technology, (3 January 2005); doi: 10.1117/12.578181
Show Author Affiliations
Xiaodong Fan, Tsinghua Univ. (China)
Duanyi Xu, Tsinghua Univ. (China)
Guosheng Qi, Tsinghua Univ. (China)
Peijun Jiang, Tsinghua Univ. (China)
Kun Qian, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 5643:
Advances in Optical Data Storage Technology
Duanyi Xu; Kees A. Schouhamer Immink; Keiji Shono, Editor(s)

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