Simulation of a Spatial Light Modulator for Holographic Data Storage System
Sneha Sara Thomas1, Sheeja M. K2

1Sneha Sara Thomas, PG Scholar, Department of Electronics and Communication, SCT College of Engineering, Trivandrum (Kerala), India.
2Dr. Sheeja M K, Head of the Department, Department of Electronics and Communication, SCT College of Engineering, Trivandrum (Kerala), India.

Manuscript received on 15 June 2015 | Revised Manuscript received on 25 June 2015 | Manuscript Published on 30 June 2015 | PP: 160-163 | Volume-4 Issue-5, June 2015 | Retrieval Number: E4121064515/15©BEIESP
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Abstract: Holographic data storage is regarded as a potential technique for the next generation optical data storage with extremely high capacity and ultrafast data transfer rate. In holographic data storage system, page wise data are stored as holograms within the recording media. In this paper, Spatial Light Modulator (SLM) is simulated. The SLM is a device which is used to encode digital data pages onto a laser beam and it spatially modulates the coherent beam of light according to the electronic data pages. The spatial filtered laser beam falls on the panel of the SLM and gets intensity modulated. Thus the electronic data pages are converted into optical data pages. This modulated data pages are interfered with the reference beams to produce holograms. Multiple data pages can be stored on a single location using various multiplexing techniques such as angle multiplexing, wavelength multiplexing which results in a high density data storage system. The stored data pages are reproduced by illuminating the hologram with the corresponding reference beam. The data is read in parallel over one million bits at once, thus resulting in fast data transfer rate.
Keywords: Interference Pattern, Holographic Data Storage System, Object Beam, Reference Beam, Spatial Light Modulator

Scope of the Article: Data Visualization