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Related Experiment Video

Updated: Jun 15, 2026

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
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High efficiency multiple beam gratings.

W H Lee

    Applied Optics
    |March 10, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Researchers utilized pulse width modulation (PWM) and pulse position modulation (PPM) to engineer phase diffraction gratings. These gratings achieve high diffraction efficiency, exceeding 70%, for uniform beam splitting in optical systems.

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    Area of Science:

    • Optics and Photonics
    • Optical Engineering
    • Diffractive Optics

    Background:

    • Diffraction gratings are essential components in optical systems, particularly for beam splitting applications.
    • Key performance requirements for gratings include high diffraction efficiency and uniform intensity distribution in diffracted beams.
    • Phase gratings are known to achieve high diffraction efficiency.

    Purpose of the Study:

    • To investigate the use of pulse width modulation (PWM) and pulse position modulation (PPM) for creating advanced diffraction grating structures.
    • To achieve uniform intensity distribution in the central block of diffracted beams using these modulation techniques.
    • To demonstrate high diffraction efficiency in phase gratings engineered with PWM and PPM.

    Main Methods:

    • Employing pulse width modulation (PWM) and pulse position modulation (PPM) to define grating structures.
    • Designing phase relief for the diffraction gratings to optimize performance.
    • Fabricating and analyzing multiple beam diffraction gratings created using PWM and PPM.

    Main Results:

    • Achieved diffraction efficiency of 70% or higher with the developed phase gratings.
    • Demonstrated the ability of PWM and PPM to produce uniform intensities in the central diffracted beams.
    • Presented examples of multiple beam diffraction gratings fabricated using these modulation techniques.

    Conclusions:

    • Pulse width modulation (PWM) and pulse position modulation (PPM) are effective methods for designing high-performance diffraction gratings.
    • These techniques enable the creation of phase gratings with excellent diffraction efficiency and uniform beam splitting capabilities.
    • The developed gratings show significant potential for advanced optical system applications.