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Proceedings Paper

Compact magneto-optical disk head using a holographic optical element with analyzer function
Author(s): Akitomo Ohba; Seijin Sugama; Ryuichi Katayama; Yutaka Urino; Yuzo Ono
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Paper Abstract

A compact magneto-optical disk head was constructed using a newly developed holographic optical element. The element has an analyzer function with more than 5dB extinction ratios for data signal detection1 in addition to focusing and tracking error signal detection functions . The element was fabricated in a birefringent LiNb03 substrate using the proton exchange method. which is a well known waveguide fabrication technique. In Read/Write experiments using the head, sufficient carrier-to-noise ratio values for practical use were obtained. As a typical result, a 47dB carrier-to-noise ratio was obtained for 3.7MHz pulse recorded signal.

Paper Details

Date Published: 1 August 1990
PDF: 8 pages
Proc. SPIE 1316, Optical Data Storage, (1 August 1990); doi: 10.1117/12.22023
Show Author Affiliations
Akitomo Ohba, NEC Corp. (Japan)
Seijin Sugama, NEC Corp. (Japan)
Ryuichi Katayama, NEC Corp. (Japan)
Yutaka Urino, NEC Corp. (Japan)
Yuzo Ono, NEC Corp. (Japan)


Published in SPIE Proceedings Vol. 1316:
Optical Data Storage

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