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Simultaneous multi-bit recording in fused silica for permanent storage

Simultaneous multi-bit recording in fused silica for permanent storage
Simultaneous multi-bit recording in fused silica for permanent storage
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.
0021-4922
Shiozawa, Manabu
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Watanabe, Takao
e267feba-2dc7-42da-acab-9955862d1f9a
Tatsu, Eriko
f4885498-70f0-4a1d-9704-5bc597e1d524
Umeda, Mariko
baad4245-4790-42f4-a5dc-52a011c90a4f
Mine, Toshiyuki
ce3bbec9-b529-4b57-bbb6-b9aaf2e70fbe
Shimotsuma, Yasuhiko
0664279b-def2-41d4-a5ec-207ce02013a7
Sakakura, Masaaki
3bb15bbd-d590-4cba-ab5a-862dc7acd054
Nakabayashi, Miki
d85f8f39-a91d-4f9f-8138-b0a70a8a7914
Miura, Kiyotaka
5dbc9159-ace0-4dd9-b18d-36f87ae78c47
Watanabe, Koichi
1268e3a1-02b8-4347-b8bf-e760a5ae57f7
Shiozawa, Manabu
fb75fa8c-525e-495f-b470-41307b077717
Watanabe, Takao
e267feba-2dc7-42da-acab-9955862d1f9a
Tatsu, Eriko
f4885498-70f0-4a1d-9704-5bc597e1d524
Umeda, Mariko
baad4245-4790-42f4-a5dc-52a011c90a4f
Mine, Toshiyuki
ce3bbec9-b529-4b57-bbb6-b9aaf2e70fbe
Shimotsuma, Yasuhiko
0664279b-def2-41d4-a5ec-207ce02013a7
Sakakura, Masaaki
3bb15bbd-d590-4cba-ab5a-862dc7acd054
Nakabayashi, Miki
d85f8f39-a91d-4f9f-8138-b0a70a8a7914
Miura, Kiyotaka
5dbc9159-ace0-4dd9-b18d-36f87ae78c47
Watanabe, Koichi
1268e3a1-02b8-4347-b8bf-e760a5ae57f7

Shiozawa, Manabu, Watanabe, Takao, Tatsu, Eriko, Umeda, Mariko, Mine, Toshiyuki, Shimotsuma, Yasuhiko, Sakakura, Masaaki, Nakabayashi, Miki, Miura, Kiyotaka and Watanabe, Koichi (2013) Simultaneous multi-bit recording in fused silica for permanent storage. Japanese Journal of Applied Physics, 52 (9). (doi:10.7567/JJAP.52.09LA01).

Record type: Article

Abstract

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.

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More information

Accepted/In Press date: 2 May 2013
Published date: 20 September 2013
Additional Information: No Southampton authors at time of publication

Identifiers

Local EPrints ID: 431152
URI: http://eprints.soton.ac.uk/id/eprint/431152
ISSN: 0021-4922
PURE UUID: 4788c89c-0aa5-4ea0-8d11-13a600d29d13

Catalogue record

Date deposited: 24 May 2019 16:30
Last modified: 16 Mar 2024 01:56

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Contributors

Author: Manabu Shiozawa
Author: Takao Watanabe
Author: Eriko Tatsu
Author: Mariko Umeda
Author: Toshiyuki Mine
Author: Yasuhiko Shimotsuma
Author: Masaaki Sakakura
Author: Miki Nakabayashi
Author: Kiyotaka Miura
Author: Koichi Watanabe

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