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Updated: Jun 23, 2026

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
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Comment on: Novel method for ultrashort laser pulse-width measurement based on the selfdiffraction effect.

Christophe Dorrer

    Optics Express
    |May 23, 2009
    PubMed
    Summary

    This comment argues that a proposed technique cannot measure ultrashort optical pulse widths. The method lacks a time-non-stationary element, preventing temporal information acquisition.

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    Area of Science:

    • Optics and Photonics
    • Ultrafast Science

    Background:

    • Accurate measurement of ultrashort optical pulses is crucial for advancements in various scientific fields.
    • A novel technique for measuring pulse width has recently been proposed.

    Purpose of the Study:

    • To critically evaluate the proposed technique for ultrashort optical pulse width measurement.
    • To demonstrate the inherent limitations of the proposed method in acquiring temporal information.

    Main Methods:

    • Theoretical analysis of the proposed measurement technique.
    • Examination of the components and principles of the experimental setup.
    • Identification of the absence of a time-non-stationary element.

    Main Results:

    • The proposed technique lacks the necessary time-non-stationary element required for temporal analysis.

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  • The setup is fundamentally incapable of extracting temporal information from ultrashort pulses.

    • Conclusions:

    • The discussed technique is unsuitable for measuring the pulse width of ultrashort optical pulses.
    • The theoretical basis of the proposed method is flawed due to the omission of critical temporal dynamics.