Abstract
Though a variety of lasers have been used for holography over the years, a data storage system that is commercially viable requires a compact, efficient and ultimately low-cost source. The main requirements are coherence and wavelength compatibility with the material. Conventional semiconductor lasers, though compact and efficient, generally lack the coherence length required for holography. Similarly, gas lasers such as argon ion can be used in the laboratory to characterize materials, but the need for external cooling, the large size, and the immense power requirements preclude their use in real systems. In this section we first examine the general requirements for a laser suitable for practical holographic data storage, and then concentrate on two particular laser systems that meet our criteria: diode-pumped solid-state lasers and wavelength-stabilized semiconductor lasers. The two lasers that are particularly relevant are the diode-pumped frequency-doubled Nd:YAG, and the InGaP DFB lasers.
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Pezeshki, B., Orlov, S.S. (2000). Laser Sources. In: Coufal, H.J., Psaltis, D., Sincerbox, G.T. (eds) Holographic Data Storage. Springer Series in Optical Sciences, vol 76. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-47864-5_13
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DOI: https://doi.org/10.1007/978-3-540-47864-5_13
Publisher Name: Springer, Berlin, Heidelberg
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