Simultaneous Multi-Bit Recording and Driveless Reading for Permanent Storage in Fused Silica

A storage system using fused silica is a promising way to store historically valuable data permanently. To increase recording capacity, we studied the recording and reading conditions for a multi-layer sample. The 26-layer sample, which had a recording capacity equivalent to that of a digital versat...

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Bibliographic Details
Published in:Journal of laser micro nanoengineering 2014-03, Vol.9 (1), p.1-4
Main Author: Shiozawa, Manabu
Format: Article
Language:English
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Summary:A storage system using fused silica is a promising way to store historically valuable data permanently. To increase recording capacity, we studied the recording and reading conditions for a multi-layer sample. The 26-layer sample, which had a recording capacity equivalent to that of a digital versatile disc (DVD), was made with a femtosecond laser and a spatial light modulator (SLM). The recording pulse energy and interlayer crosstalk were reduced by correcting spherical aberration. The sample was evaluated and read with an optical microscope. The signal-to-noise ratio (SNR) criterion of 15 dB was satisfied in all 26 layers by using signal processing. Thermal resistance at 1,000 °C for 120 minutes was demonstrated, suggesting a semi-permanent lifetime. [PUBLICATION ABSTRACT]
ISSN:1880-0688
1880-0688
DOI:10.2961/jlmn.2014.01.0001