19 May 2009 Holographic data storage with a planar-integrated optical write-read head
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Abstract
The construction of a write-once-read-many-type optical write-read-head for volume holographic data storage in disk-based photopolymer storage media is discussed. Its design is based on the photonic integration concept called planar-integrated free-space optics. A proof-of-principle demonstrator was fabricated, it contains a 3mm thick fused silica wafer that carries most passive components for the reference and the signal beam relay in the form of diffractive optical elements, a translucent liquid crystal microdisplay, and the CCD sensor of a webcam. Phenanthrenequinone-doped polymethylmethacrylate was chosen as storage material, a DPSS laser with λ = 532nm serves as light source. We report about preliminary experiments to determine suitable exposure parameters for holographic write-read operations, and on the use of data matrix codes for the encoding and decoding of information.
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Matthias Soellner, Udo Vieth, Ken Yuh Hsu, Shiuan Huei Lin, Matthias Gruber, "Holographic data storage with a planar-integrated optical write-read head", Proc. SPIE 7358, Holography: Advances and Modern Trends, 73580Y (19 May 2009); doi: 10.1117/12.821615; https://doi.org/10.1117/12.821615
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