Flying magnetooptical read/write head employing an optical integ

Details Flying magnetooptical read/write head employing an optical integ Flying magnetooptical read/write head employing an optical integ

1992-03-06

1993-03-30

Ullah, Akm E.

Optical waveguides

With optical coupler

Input/output coupler

360114, G02B 600, G02B 636

Patent

active

051990903

ABSTRACT:
A magnetooptic head is fabricated on a glass slider and flown adjacent a magnetooptic disk in a disk drive. The transducer is fabricated on an end of the glass slider. A planar or channel waveguide structure, fabricated by ion exchange in the end face of the glass slider, couples light from a light source, such as a laser diode, to the disk for reading or writing. The head employs near-field optical techniques at the operating flying height, eliminating the need for a focusing servo. Near field operation also allows increased bit and track densities due to reduced spot size and direct overwrite using Magnetic Field Modulation on current generations (simple) magnetooptic thin films.

REFERENCES:
patent: 4666789 (1987-05-01), Gueughon et al.
patent: 4777553 (1988-10-01), Aoi et al.

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