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Dual-transverse-mode microsquare lasers with tunable wavelength interval.

Heng Long, Yong-Zhen Huang, Xiu-Wen Ma

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    |August 11, 2015
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    Summary

    A novel dual-transverse-mode microsquare laser with a tunable wavelength interval was developed. This laser generates tunable microwave signals, demonstrating potential for advanced optical communication systems.

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    Area of Science:

    • Optoelectronics
    • Semiconductor Lasers

    Background:

    • Microsquare lasers are compact optical sources.
    • Controlling wavelength tunability is crucial for applications.

    Purpose of the Study:

    • To design and realize a dual-transverse-mode microsquare laser with tunable wavelength interval.
    • To investigate the laser's performance in generating microwave signals.

    Main Methods:

    • Utilizing a square-ring-patterned contact window for laser design.
    • Fabricating a 30-μm-side-length microsquare laser with a 4-μm square-ring width.
    • Varying injection current to tune wavelength interval and observe microwave signal generation.

    Main Results:

    • Achieved a tunable wavelength interval from 0.25 to 0.37 nm with an intensity ratio < 2.5 dB.
    • Generated microwave signals at frequencies 30.56, 32.70, 35.12, and 39.51 GHz.
    • Observed 3-dB bandwidths of 47, 53, 54, and 47 MHz at specific injection currents.

    Conclusions:

    • The developed dual-transverse-mode microsquare laser offers tunable wavelength intervals.
    • The laser successfully generates high-frequency microwave signals, indicating potential for microwave photonics applications.