High optical efficient integrated head for use in magneto-optical disk drive

Author

Odajima, Wataru ; Tawa, Fumihiro ; Aoyama, Nobuhide ; Hokari, Mamoru ; Shibano, Motomichi ; Hasegawa, Shin-ya

Author_Institution

Fujitsu Labs. Ltd., Atsugi, Japan

fYear

2002

fDate

2002

Firstpage

389

Lastpage

391

Abstract

We developed an integrated optical head for use with MO (magneto-optical) disks that makes it possible to adjust the focusing error signal (FES) and tracking error signal independently and to obtain high gain servo signals with a DOE (diffractive optical element). It prevents the changing of the FES caused by temperature changes by using a quasi-phase conjugate system. The cylindrical beam-splitter and the automatic power control-DOE achieve high optical efficiency and MO signal quality.

Keywords

diffractive optical elements; disc drives; integrated optics; magneto-optical recording; optical beam splitters; optical disc storage; optical focusing; servomechanisms; DOE; FES temperature change effects; MO disks; MO signal quality; TES; automatic power control-DOE; cylindrical beam-splitter; diffractive optical elements; focusing error signal; high efficiency integrated optical heads; high gain servo signals; magneto-optical disk drives; quasi-phase conjugate system; tracking error signal; Disk drives; High speed optical techniques; Integrated optics; Magnetic heads; Optical computing; Optical sensors; Power lasers; Servomechanisms; Signal detection; US Department of Energy;

fLanguage

English

Publisher

ieee

Conference_Titel

Optical Memory and Optical Data Storage Topical Meeting, 2002. International Symposium on

Print_ISBN

0-7803-7379-0

Type

conf

DOI

10.1109/OMODS.2002.1028676

Filename

1028676