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Injection-induced, tunable all-optical gating in a two-state quantum dot laser.

E A Viktorov, I Dubinkin, N Fedorov

    Optics Letters
    |July 30, 2016
    PubMed
    Summary
    This summary is machine-generated.

    We demonstrate all-optical gating in quantum dot lasers. Optical injection controls emission states, enabling tunable excited-state pulsations by creating ground-state dropouts.

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    Area of Science:

    • Optics and Photonics
    • Semiconductor Lasers
    • Quantum Dot Devices

    Background:

    • Quantum dot lasers exhibit complex emission dynamics.
    • Controlling emission states is crucial for laser applications.
    • All-optical control offers advanced modulation capabilities.

    Purpose of the Study:

    • To demonstrate and characterize a tunable all-optical gating phenomenon.
    • To investigate the switching of emission between ground and excited states.
    • To utilize ground-state dropouts for controlling excited-state pulsations.

    Main Methods:

    • Utilizing a single-section quantum dot laser.
    • Employing optical injection into the material's ground state.
    • Detuning the master laser to induce periodic ground-state dropouts.
    • Performing numerical simulations with a rate equation model.

    Main Results:

    • Achieved tunable all-optical gating by switching emission states.
    • Demonstrated complete suppression of excited-state emission via ground-state injection.
    • Observed periodic ground-state dropouts when the master laser is detuned.
    • Validated experimental findings with rate equation model simulations.

    Conclusions:

    • All-optical gating is feasible in quantum dot lasers.
    • Ground-state dropouts effectively gate excited-state pulsations.
    • The demonstrated phenomenon offers precise control over laser dynamics.