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Applied Optics

Applied Optics


  • Vol. 28, Iss. 20 — Oct. 15, 1989
  • pp: 4360–4365

Supersmall flying optical head for phase change recording media

Hiroo Ukita, Yoshitada Katagiri, and Susumu Fujimori  »View Author Affiliations

Applied Optics, Vol. 28, Issue 20, pp. 4360-4365 (1989)

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A supersmall optically switched laser (OSL) head is proposed. A laser diode attached to an air bearing slider forms a complex cavity together with a recording medium, and its light output is detected by a photodetector placed at the other end of the laser facet. Data signals and track error signals read from the sampled servo marks are successfully detected. The signal amplitude variation caused by the flying height change is much reduced, and the SNR is increased to 36 dB (40 kHz to 20 MHz for a phase change medium) by decreasing the reflectivity of the laser facet facing the medium to <5%.

© 1989 Optical Society of America

Original Manuscript: March 15, 1989
Published: October 15, 1989

Hiroo Ukita, Yoshitada Katagiri, and Susumu Fujimori, "Supersmall flying optical head for phase change recording media," Appl. Opt. 28, 4360-4365 (1989)

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  1. H. Ukita, Y. Katagiri, Y. Uenishi, “Readout Characteristics of Micro-Optical Head Operated in Bistable Mode,” Jpn. J. Appl. Phys. 26, Suppl. 26-4, 111–116 (1987).
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  6. N. Tamaru, H. Hosaka, S. Hara, N. Funakoshi, K. Kogure, “A Study of a Flexible Optical Disk Drive,” in Technical Digest, Topical Meeting on Optical Data Storage (Optical Society of America, Washington, DC, 1989), pp. 59–62.
  7. S. Fujimori, S. Yagi, H. Yamazaki, N. Funakoshi, “Crystallization Process of Sb-Te Alloy Films for Optical Storage,” J. Appl. Phys. 64, 1000–1004 (1988). [CrossRef]
  8. B. I. Finkelstein, W. C. Williams, “Noise Sources in Magnetooptic Recording,” Appl. Opt. 27, 703–709 (1988). [CrossRef] [PubMed]

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