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Related Experiment Video

Updated: Jun 20, 2026

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
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Published on: April 1, 2020

Injection-beam parameter optimization of an injection-locked diode-laser array.

M K Chun, L Goldberg, J F Weller

    Optics Letters
    |September 15, 2009
    PubMed
    Summary
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    Wide-beam injection significantly enhances the far-field power in injection-locked arrays, concentrating 95% into the main lobe compared to 70% for single-point injection. This finding aligns with experimental observations in laser arrays.

    Area of Science:

    • Optics and Photonics
    • Laser Physics
    • Array Optics

    Background:

    • External injection locking is a technique used to control and improve the performance of laser arrays.
    • The far-field distribution is a critical parameter for applications requiring high spatial coherence and beam quality.

    Purpose of the Study:

    • To investigate the impact of injected beam width and power on the far-field distribution of an externally injection-locked array.
    • To quantify the power fraction within the diffraction-limited lobe under different injection conditions.

    Main Methods:

    • Numerical simulations were employed to model the behavior of the injection-locked array.
    • The study analyzed the dependence on injected beam width and power.

    Main Results:

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    Last Updated: Jun 20, 2026

    Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
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    Published on: April 1, 2020

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    10:52

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    • Wide-beam injection resulted in a significantly larger fraction of power (95%) in the diffraction-limited lobe compared to single-point injection (70%).
    • The power concentration in the far-field lobe is highly dependent on the characteristics of the injected beam.

    Conclusions:

    • Wide-beam injection is a more effective strategy for achieving high power concentration in the far-field of injection-locked arrays.
    • The simulation results show qualitative agreement with experimental data from a 20-element array, validating the model.