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Phase-locked, pre-amplified optical injection locking at low input powers.

J Connor Skehan, Magnus Karlsson, Peter A Andrekson

    Optics Express
    |February 1, 2024
    PubMed
    Summary
    This summary is machine-generated.

    This study explores stable optical injection locking limits with amplified input light and noise. Researchers observed phase slips due to noise but achieved stable continuous wave output power.

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    Area of Science:

    • Photonics
    • Laser Physics
    • Optical Engineering

    Background:

    • Optical injection locking synchronizes a slave laser to a master laser's frequency.
    • Pre-amplified injection locking enhances signal strength but can be sensitive to noise.

    Purpose of the Study:

    • Investigate the stability limits of optically pre-amplified injection locking.
    • Analyze the impact of input field noise and phase-locked loops on system stability.
    • Characterize phase slips and their causes.

    Main Methods:

    • Modified rate equations to model the system near stability limits.
    • Simulations to predict system behavior under noisy conditions.
    • Experimental validation of simulation results.

    Main Results:

    • Identified phase slips caused by injected noise momentarily destabilizing the system.
    • Achieved stable continuous wave (CW) output at -80 dBm input power.
    • Phase slip-free operation was achieved at -70 dBm input power.
    • Demonstrated 20 dBm output power from the injection-locked slave laser.

    Conclusions:

    • The study defines the operational limits for stable pre-amplified optical injection locking.
    • Noise-induced phase slips are a critical factor affecting stability.
    • The system can reliably recover a CW wave with significant output power even under noisy conditions.