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Phase jitter in an injection-locked semiconductor laser.

O Lidoyne, P Gallion, G Debarge

    Optics Letters
    |September 23, 2009
    PubMed
    Summary

    We derived an expression for phase jitter in injection-locked semiconductor lasers, enabling power spectrum determination. Theoretical findings align well with prior experimental data.

    Area of Science:

    • Optics and Photonics
    • Semiconductor Device Physics

    Background:

    • Semiconductor lasers are crucial for optical communications.
    • Injection locking is a technique to improve laser stability and spectral properties.
    • Phase jitter affects laser performance and signal integrity.

    Purpose of the Study:

    • To derive a theoretical expression for the mean-square phase jitter of an injection-locked semiconductor laser.
    • To determine the power spectrum of the locked laser based on the derived phase jitter expression.
    • To validate the theoretical model by comparing it with existing experimental results.

    Main Methods:

    • Derivation of a mathematical expression for mean-square phase jitter.
    • Analysis of the power spectrum of the injection-locked laser.

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  • Comparison of theoretical predictions with previously published experimental data.

    • Main Results:

    • A closed-form expression for the mean-square phase jitter was successfully derived.
    • The derived expression accurately predicts the power spectrum of the injection-locked semiconductor laser.
    • Theoretical results show good agreement with experimental data from 1988.

    Conclusions:

    • The developed theoretical model provides a reliable method for analyzing phase jitter in injection-locked semiconductor lasers.
    • The study confirms the validity of the theoretical approach through experimental validation.
    • This work contributes to a better understanding and prediction of semiconductor laser performance.