Transmission type twisted nematic liquid crystal display for three gray-level phase-modulated holographic data storage systems |
| |
Authors: | Bhargab Das Sunil Vyas Joby Joseph P. Senthilkumaran Kehar Singh |
| |
Affiliation: | aPhysics Department, Indian Institute of Technology Delhi, New Delhi 110016, India |
| |
Abstract: | Gray-level data pages enhance the storage capacity of holographic data storage systems. A balanced three gray-scale data page in phase mode produces a homogenized Fourier spectrum which is regarded to be necessary for suitable exploitation of the holographic recording medium. A commercially available transmission type twisted nematic liquid crystal display has been characterized for use as a phase spatial light modulator with phase modulation in the range 0–3π/2 at 532 nm wavelength, such that it may be used for holographic data storage with binary as well as three gray-level phase-modulated data pages. Experimental results of the phase and amplitude modulation characteristics of the SLM, Fourier plane homogeneity, and recording of phase-modulated binary, three gray-level data pages and their reconstruction with a real-time holographic interferometric method are presented. |
| |
Keywords: | Holographic data storage Gray-scale data page Phase-only modulation Spatial light modulator |
本文献已被 ScienceDirect 等数据库收录! |