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Stable locking phase limits of optically injected semiconductor lasers.

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    |February 12, 2014
    PubMed
    Summary
    This summary is machine-generated.

    This study theoretically analyzes optically injected laser stability, focusing on locked phase dynamics. It reveals how injection ratio affects phase limits and enables determining laser parameters from a single voltage measurement.

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    Area of Science:

    • Optics and Photonics
    • Semiconductor Lasers
    • Nonlinear Dynamics

    Background:

    • Previous research on optically injected lasers primarily focused on frequency detuning limits.
    • Understanding the locked phase is crucial for laser stability analysis.

    Purpose of the Study:

    • To theoretically investigate the stability of optically injected lasers with an emphasis on locked phase.
    • To explore the dependence of phase limits on injection ratio and identify key detuning points.
    • To demonstrate a method for determining laser parameters using voltage measurements.

    Main Methods:

    • Theoretical analysis of optically injected laser stability.
    • Examination of photon and carrier number curves in stable and unstable locking regions.
    • Investigation of frequency detunings for zero locked phase at various injection ratios.

    Main Results:

    • The phase limits exhibit a three-region dependence on injection ratio, each with distinct phase boundary descriptions.
    • Zero phase detuning points were identified for different injection ratios.
    • The coupling rate and linewidth enhancement factor can be determined via a single voltage measurement under weak injection using the zero phase point.
    • Modulation response parameters at these detunings are strongly interconnected.

    Conclusions:

    • The study provides a deeper understanding of locked phase dynamics in optically injected lasers.
    • A practical method for characterizing laser parameters is proposed.
    • Interconnections between modulation response parameters are highlighted.