High-SNR single-wavelength readout for quadri-valued MO recording by detecting both magneto-optical rotation angle and ellipticity

Katsuji Nakagawa; Akiyoshi Itoh

doi:10.1117/12.399342

18 September 2000 High-SNR single-wavelength readout for quadri-valued MO recording by detecting both magneto-optical rotation angle and ellipticity

Katsuji Nakagawa, Akiyoshi Itoh

Author Affiliations +

Proceedings Volume 4090, Optical Data Storage 2000; (2000) https://doi.org/10.1117/12.399342
Event: Optical Data Storage, 2000, Whistler, BC, Canada

Abstract

A new high SNR readout method for quadri-valued MO recoding by detecting both MO rotation angle (theta) and ellipticity (eta) with only single wavelength is proposed. This advanced method is demonstrated by using a double-layered MO disk and green laser. Each layer of the double layered MO disk is independently read by an optical head for detecting (theta) and (eta) at 514.5 nm in wavelength.

Citation Download Citation

Katsuji Nakagawa and Akiyoshi Itoh "High-SNR single-wavelength readout for quadri-valued MO recording by detecting both magneto-optical rotation angle and ellipticity", Proc. SPIE 4090, Optical Data Storage 2000, (18 September 2000); https://doi.org/10.1117/12.399342

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