A type of optical head with crosstalk canceller (CTC)[1] investigated so far increased considerably the storage density of the optical disks. This type of the CTC, however, required off-axis beams to detect signals from adjacent tracks, and also additional electronics to compensate for time delay between the main-beam and the sub-beams. Such beam separation caused the system unstable, because the delay time fluctuates due to the change in the wavelength, and also because the decentering of the disk resulted radial positioning error of sub-beams. To overcome these problems, we have proposed a new typed crosstalk canceller using coaxial dual beams which are orthogonally polarized[2.] In this paper, we demonstrate a practical configuration of an optical head with the CTC, and some experimental results with play back characteristics.

Date Published: 28 June 1999
PDF: 3 pages
Proc. SPIE 3864, Joint International Symposium on Optical Memory and Optical Data Storage 1999, 38640D (28 June 1999); doi: 10.1117/12.997599

Published in SPIE Proceedings Vol. 3864:
Joint International Symposium on Optical Memory and Optical Data Storage 1999
Shigeo R. Kubota; Ryuichi Katayama; Douglas G. Stinson, Editor(s)