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    This study presents an efficient method for extracting parameters of distributed feedback (DFB) lasers using an equivalent circuit model, reducing experimental complexity. The technique accurately models laser performance, offering a versatile solution for semiconductor laser characterization.

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    Area of Science:

    • Semiconductor device physics
    • Laser engineering
    • Electrical engineering

    Background:

    • Conventional parameter extraction for distributed feedback (DFB) lasers is often cumbersome and requires extensive experimentation.
    • Accurate modeling of DFB lasers is crucial for optimizing their performance and understanding their behavior.

    Purpose of the Study:

    • To develop an efficient and systematic method for parameter extraction in DFB lasers.
    • To create an equivalent circuit model that accurately represents both intrinsic and extrinsic laser parameters.
    • To validate the proposed method through experimental measurements and comparisons with existing models.

    Main Methods:

    • Development of an equivalent circuit model incorporating intrinsic parameters from rate equations and extrinsic parameters.
    • Experimental verification using DFB laser chip measurements of electronic and optical performance.
    • Extraction of nine intrinsic and five extrinsic parameters using the developed technique.
    • Comparison of modeled and measured laser output characteristics.

    Main Results:

    • The proposed equivalent circuit model successfully incorporates essential intrinsic and extrinsic parameters.
    • Experimental validation demonstrated good agreement between modeled and measured laser output characteristics.
    • The method efficiently extracted nine intrinsic and five extrinsic parameters from experimental data.
    • The technique proved versatile for other semiconductor lasers describable by rate equations.

    Conclusions:

    • The developed equivalent circuit model and parameter extraction method offer an efficient and systematic solution for DFB lasers.
    • The method provides a better approximation of actual laser behavior compared to conventional techniques.
    • The reliability of the model and extraction method is validated through experimental results and comparisons with published models.