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Spherical Bragg resonators for lasing applications: a theoretical approach.

Yalina García-Puente, Raman Kashyap

    Optics Express
    |December 23, 2022
    PubMed
    Summary
    This summary is machine-generated.

    This study demonstrates theoretical control over optical amplification in Spherical Bragg Resonators (SBRs) for lasing. Researchers achieved specific threshold gain factors by analyzing S-matrix poles and zeros in doped SBRs.

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    Area of Science:

    • Photonics
    • Optical Engineering
    • Materials Science

    Background:

    • Spherical Bragg Resonators (SBRs) are 3D photonic crystals with potential for lasing applications.
    • Engineering optical gain and threshold characteristics is crucial for developing SBR-based lasers.

    Purpose of the Study:

    • To theoretically investigate the lasing properties of an Er3+ doped SBR.
    • To determine the threshold gain factor for lasing in a specific SBR configuration.

    Main Methods:

    • Utilized the recursive transfer matrix method to analyze light scattering within the SBR.
    • Scanned poles and zeros of the S-matrix in the complex frequency plane to identify lasing conditions.

    Main Results:

    • Calculated the threshold gain factor for a six Si/SiO2 bilayer SBR.
    • Determined that a dopant density of 5.63 × 10^20 Er3+ ions/cm³ is required for lasing.

    Conclusions:

    • This work provides the first theoretical demonstration of engineering optical amplification and threshold gain for lasing in SBRs.
    • The findings pave the way for designing advanced SBR-based laser devices.