Simultaneous Multi-Bit Recording in Fused Silica for Permanent Storage

• Manabu Shiozawa

• Takao Watanabe

• Eriko Tatsu

• Mariko Umeda

• Toshiyuki Mine

• Yasuhiko Shimotsuma

• Masaaki Sakakura

• Miki Nakabayashi

• Kiyotaka Miura

• Koichi Watanabe

抄録

In recent years, optical discs and hard disc drives have been widely used as storage media. However, the lifetime of recorded data in these media is about 100 years. On the other hand, a permanent storage system that can store data for more than 1,000 years is strongly required, especially for historically valuable data. One candidate system for permanent storage is a system using fused silica, which is thermally and chemically stable. In this paper, we reported simultaneous multi-bit recording in fused silica with a femtosecond laser and a spatial light modulator. The recording quality was evaluated using signal-to-noise ratio with an optical microscope. We recorded a four-layer sample with a dot pitch of 2.8 µm and obtained a signal-to-noise ratio greater than 15 dB. Furthermore, we confirmed that the sample had good thermal resistance at 1,000 °C for 120 min, which indicates a lifetime of over 319 million years.

収録刊行物

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 52 (9S2), 09LA01-, 2013-09-01

  IOP Publishing

キーワード

• General Physics and Astronomy
• General Engineering

詳細情報

• CRID: 1360003449887834368
• NII論文ID: 210000142874
• DOI: 10.7567/jjap.52.09la01
• ISSN: 13474065
• ISSN: 00214922
• ISSN: http://id.crossref.org/issn/13474065
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.52.09LA01
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.52.09LA01/pdf
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