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High-speed electronic beam steering using injection locking of a laser-diode array.

E A Swanson, G L Abbas, S Yang

    Optics Letters
    |September 10, 2009
    PubMed
    Summary
    This summary is machine-generated.

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    This study demonstrates high-speed electronic beam steering for a laser-diode array. Researchers achieved rapid control by modulating the array

    Area of Science:

    • Optoelectronics
    • Laser Technology
    • Photonics

    Background:

    • Laser-diode arrays are crucial for applications requiring high optical power.
    • Efficient beam steering is essential for dynamic optical systems.
    • Injection locking synchronizes multiple laser diodes for coherent output.

    Purpose of the Study:

    • To investigate high-speed electronic beam steering of a 10-stripe laser-diode array.
    • To demonstrate beam steering via injection locking to a master laser.
    • To determine the achievable bandwidths for electronic beam steering techniques.

    Main Methods:

    • Injection locking a 10-stripe laser-diode array to a single-frequency master laser diode.
    • Modulating the injection current of the laser-diode array for beam steering.

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    Direct Imaging of Laser-driven Ultrafast Molecular Rotation
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  • Modulating the frequency of the master laser for beam steering.

    • Main Results:

    • Successful high-speed electronic steering of the locked 0.5-degree wide far-field lobe.
    • Achieved closed-loop tracking bandwidths of 70 kHz and 3 MHz.
    • Identified frequency modulation (FM) response of modulated devices as the limiting factor for bandwidth.

    Conclusions:

    • High-speed electronic beam steering of injection-locked laser-diode arrays is feasible.
    • Modulation techniques offer rapid control over the laser beam's direction.
    • The FM response characteristics dictate the ultimate beam-steering bandwidth.