Three-dimensional optical data storage in vitreous silica

Mitsuru Watanabe, Hongbo Sun, Saulius Juodkazis, Toshimasa Takahashi, Shigeki Matsuo, Yoshihisa Suzuki, Jyunji Nishii, Hiroaki Misawa

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Abstract

To achieve high bit densities (> 10 GB/cm3) in optical memory, we accomplished a three-dimensional optical data storage system using vitreous silica as the recording material. We succeeded in high-density optical recording by focusing pulsed laser beams of 532 nm (full width at half maximum [FWHM] 30 ps) and 400 nm (150 fs). A recording density of 72.9 GB/cm3 was achieved, which corresponded to that of 100 compact disks, on a glass plate of (2 × 2) cm2 and 2.2 mm thickness. We found that the optical damage of silica occurs within 400 ps after irradiation by a single pulse for 30 ps at 532 nm. Three photoluminescence bands were found in the photomodified silica at 283 nm, 468 nm and 558 nm. All the three bands showed similar photoluminescence excitation spectra, i.e. a peak related to oxygen vacancy absorption at 250 nm.

Original languageEnglish
Pages (from-to)L1527-L1530
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume37
Issue number12 SUPPL. B
Publication statusPublished - 1998 Dec 15

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Keywords

  • Defects in glass
  • Femtosecond laser fabrication
  • Optical properties
  • Photoluminescence
  • Picosecond laser fabrication
  • Three-dimensional optical data storage
  • Vitreous silica

ASJC Scopus subject areas

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

Cite this

Watanabe, M., Sun, H., Juodkazis, S., Takahashi, T., Matsuo, S., Suzuki, Y., Nishii, J., & Misawa, H. (1998). Three-dimensional optical data storage in vitreous silica. Japanese Journal of Applied Physics, Part 2: Letters, 37(12 SUPPL. B), L1527-L1530.