Magneto-optical recording and reproducing apparatus having a las

Details Magneto-optical recording and reproducing apparatus having a las Magneto-optical recording and reproducing apparatus having a las

1994-09-22

1996-02-27

Epps, Georgia Y.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360114, G11B 1100

Patent

active

054954568

ABSTRACT:
A recording and/or reproducing apparatus for a magneto-optical recording medium includes a semiconductor laser device for radiating a laser beam to the magneto-optical recording medium, a driving circuit for supplying a driving signal to the semiconductor laser device, a first oscillating circuit for generating first high-frequency signals superposed on the driving signal from the driving circuit during recording on the magneto-optical recording medium, and a second oscillating circuit for generating second high-frequency signals superposed on the driving signal from the driving circuit during reproduction from the magneto-optical recording medium. The first high-frequency signals are of a frequency twice the maximum recording frequency or higher, and the second high-frequency signals are of a frequency different from that of the first high-frequency signals. The semiconductor laser device is fed during recording and during reproduction with signals which are the driving signals from the driving circuit superposed on by the first high frequency signals from the first oscillating circuit and with signals which are the driving signals from the driving circuit superposed on by the second high frequency signals.

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