Compact magneto-optical disk head using a holographic optical element with analyzer function

Akitomo Ohba; Seijin Sugama; Ryuichi Katayama; Yutaka Urino; Yuzo Ono

doi:10.1117/12.22023

1 August 1990 Compact magneto-optical disk head using a holographic optical element with analyzer function

Akitomo Ohba, Seijin Sugama, Ryuichi Katayama, Yutaka Urino, Yuzo Ono

Proceedings Volume 1316, Optical Data Storage; (1990) https://doi.org/10.1117/12.22023
Event: Optical Data Storage, 1990, Vancouver, Canada

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.

Citation Download Citation

Akitomo Ohba, Seijin Sugama, Ryuichi Katayama, Yutaka Urino, and Yuzo Ono "Compact magneto-optical disk head using a holographic optical element with analyzer function", Proc. SPIE 1316, Optical Data Storage, (1 August 1990); https://doi.org/10.1117/12.22023

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