The development of a novel optical floppy disk drive using a phase change optical medium and a quasi-near-field optical head

Young Joo Kim, Yutaka Hasegawa, Kenya Goto

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The optical memory system still has some shortcomings such as slow tracking access speed and high fabrication cost due to its relatively heavy head weight and complex optical elements. To overcome these limitations, a new lensless optical floppy disk drive has been developed using a phase change optical floppy disk and an external cavity semiconductor laser with a good antireflection (AR) coaling on the emitting facet. The main components of this novel system are a contact-type head of quasi-near-field optics and a phase change medium prepared on a flexible polyimide substrate. The AR-coated semiconductor laser oscillates externally with the disk and its laser emission output shows sufficient variance to detect the phase difference on the recording layer. In our primitive drive, the simple optical head shows good writing performance and the recorded marks present sub-micrometer size, which indicate the high possibility of the development of a new, inexpensive floppy system of above 500 MB data capacity.

Original languageEnglish
Pages (from-to)929-932
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume39
Issue number2 B
Publication statusPublished - 2000 Dec 1

Fingerprint

Floppy disk storage
optical disks
Semiconductor lasers
near fields
semiconductor lasers
Optical data storage
Optical devices
polyimides
Polyimides
micrometers
flat surfaces
Optics
recording
optics
costs
Fabrication
cavities
fabrication
Lasers
output

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

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