Semiconductor laser device and optical disk drive

Details Semiconductor laser device and optical disk drive Semiconductor laser device and optical disk drive

1996-08-16

1998-07-14

Bovernick, Rodney B.

Coherent light generators

Particular active media

Semiconductor

372 43, 356359, H01S 318

Patent

active

057815763

ABSTRACT:
An optical disk drive has an aberration detector and an aberration correction circuit. A semiconductor laser device made of semiconductor crystals constituting a semiconductor laser light source includes an active layer for performing light amplification through current injection and guiding light in waveguide, a reflection member for reflecting light into said active layer, and a top electrode and a bottom electrode used for current injection to the active layer, wherein the top electrode is divided into a main electrode and a plurality of subsidiary electrodes, and injection current to the subsidiary electrodes is controlled so as to correct an aberration generated at an optical focussing system and an optical disk.

REFERENCES:
patent: 4365323 (1982-12-01), Heemskerk et al.
patent: 4996169 (1991-02-01), Lee
patent: 5039191 (1991-08-01), Myszka
patent: 5157459 (1992-10-01), Oono et al.
patent: 5212699 (1993-05-01), Masuko et al.
patent: 5216729 (1993-06-01), Berger et al.
patent: 5521754 (1996-05-01), Nitta et al.
"Laser Diode with Integrated Electronic Beam Steering", IBM Technical Disclosure Bulletin, vol. 36, No. 7, Jul. 1993, pp. 147-148.

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