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Related Experiment Video

Updated: Mar 21, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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Linear phase encoding for holographic data storage with a single phase-only spatial light modulator.

Teruyoshi Nobukawa, Takanori Nomura

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    |May 4, 2016
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    Summary
    This summary is machine-generated.

    A novel linear phase encoding method enables compact holographic data storage using a single spatial light modulator (SLM). This technique allows complex amplitude modulation and filters imperfections for efficient data recording and retrieval.

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    Area of Science:

    • Optics and Photonics
    • Information Storage

    Background:

    • Holographic data storage offers high density but faces challenges with system complexity and component imperfections.
    • Modulating complex amplitude distributions typically requires multiple components or advanced SLMs.

    Purpose of the Study:

    • To introduce a linear phase encoding method for simplified holographic data storage.
    • To demonstrate the feasibility of using a single phase-only spatial light modulator (SLM).
    • To address and mitigate artifacts caused by SLM imperfections.

    Main Methods:

    • Development of a linear phase encoding technique for complex amplitude modulation.
    • Implementation of spatial frequency filtering using a Nyquist aperture to remove undesired light.
    • Experimental verification in a coaxial holographic data storage system.

    Main Results:

    • Successful modulation of complex amplitude distribution with a single phase-only SLM.
    • Experimental validation of signal beam generation using linear phase encoding.
    • Demonstration of single data recording, shift selectivity, and shift-multiplexed recording in a coaxial system.

    Conclusions:

    • Linear phase encoding provides a compact and simple solution for holographic data storage systems.
    • The method effectively handles SLM imperfections, enhancing data fidelity.
    • The demonstrated capabilities pave the way for practical, high-density holographic storage.