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Single-mode unidirectional-emission circular-side hexagonal resonator microlasers.

Zhi-Xiong Xiao, Yong-Zhen Huang, Yue-De Yang

    Optics Letters
    |April 1, 2017
    PubMed
    Summary
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    Circular-side hexagonal resonator (CSHR) microlasers enhance mode Q factors and achieve single-mode operation. Fabricated CSHR microlasers demonstrate a 43 dB side-mode suppression ratio and 13 GHz bandwidth.

    Area of Science:

    • Photonics and optical engineering
    • Semiconductor device physics

    Background:

    • Microlasers are crucial for integrated photonics.
    • Enhancing mode Q factor and achieving single-mode operation are key challenges.

    Purpose of the Study:

    • To propose and demonstrate Circular-Side Hexagonal Resonator (CSHR) microlasers.
    • To enhance mode Q factor and achieve single-mode operation in microlasers.

    Main Methods:

    • 3D simulation of CSHRs with optimized deformation.
    • Fabrication of CSHR microlasers with output waveguides using planar technology.

    Main Results:

    • Optimized CSHRs significantly enhance mode Q factors.
    • Achieved single-mode operation with a 43 dB side-mode suppression ratio.

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  • Demonstrated a low threshold current of 2.5 mA and a 13 GHz 3 dB bandwidth.

    • Conclusions:

    • CSHR microlasers offer a viable solution for high-performance photonic integrated circuits.
    • The proposed design enables efficient single-mode operation and broadband modulation.