Integrated-optic disc pickups

Hiroshi Nishihara; Toshiaki Suhara; Shogo Ura

doi:10.1117/12.137576

13 August 1992 Integrated-optic disc pickups

Hiroshi Nishihara, Toshiaki Suhara, Shogo Ura

Proceedings Volume 1663, Optical Data Storage; (1992) https://doi.org/10.1117/12.137576
Event: Optical Data Storage Topical Meeting, 1992, San Jose, CA, United States

Abstract

The present status of waveguide-type integrated-optic disc pickups are reviewed. The authors have proposed and fabricated several types, and have demonstrated their fundamental functions. For the ROM pickup, they successfully reduced the focused spot to a diameter that is slightly larger than the diffraction-limited value, and confirmed capability of the focusing/tracking error signal detection. The pickup was extended to that for magneto-optical (MO) disc system, and the MO pickup was found experimentally to detect a polarization rotation as small as one contained in the signal beam reflected from MO medium. The pickup for parallel-data cards was also fabricated with photodiode array, and seven-track parallel readout was demonstrated. It was found by theoretical analysis that the waveguide-FGC combined type pickup has the possibility of super-resolution readout.

Citation Download Citation

Hiroshi Nishihara, Toshiaki Suhara, and Shogo Ura "Integrated-optic disc pickups", Proc. SPIE 1663, Optical Data Storage, (13 August 1992); https://doi.org/10.1117/12.137576

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