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Related Experiment Video

Updated: Jun 8, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
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Electronic shear interferometry: application of a (double-) pulsed laser.

R Spooren, A A Dyrseth, M Vaz

    Applied Optics
    |September 11, 2010
    PubMed
    Summary

    A double-pulsed laser simplifies interferometric metrology setups and enables the study of high-speed dynamics. This technique improves fringe visibility and compensates for laser intensity fluctuations in electronic shear interferometry.

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    Area of Science:

    • Optics and Photonics
    • Metrology
    • Experimental Physics

    Background:

    • Traditional interferometric metrology often requires highly stable experimental setups.
    • Studying high-speed dynamic processes using interferometry presents significant challenges.
    • Pulsed lasers offer potential solutions but require careful implementation.

    Purpose of the Study:

    • To demonstrate the advantages of using a double-pulsed laser in electronic shear interferometry.
    • To present an image subtraction method for generating high-quality fringe patterns.
    • To analyze and compare fringe visibility with existing techniques.

    Main Methods:

    • Utilized a double-pulsed laser system for interferometric measurements.
    • Applied image subtraction techniques to process interferometric data.

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  • Conducted theoretical analysis of fringe visibility.
  • Compared results with television-holography.

    • Main Results:

    • The double-pulsed laser relaxes stability requirements for the experimental setup.
    • Image subtraction successfully produced high-quality fringe patterns without special apertures.
    • The double-pulse subtraction technique demonstrated compensation for laser intensity fluctuations.
    • Fringe visibility was theoretically analyzed and compared to television-holography.

    Conclusions:

    • Double-pulsed lasers are effective for electronic shear interferometry, enabling study of dynamic processes.
    • The proposed image subtraction method enhances fringe pattern quality and stability.
    • This technique offers improved performance by mitigating laser intensity variations.