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    This study optimized a picosecond microchip laser using a Ti:sapphire laser. Self-injection seeding significantly reduced timing jitter by a factor of 23, with higher pulse energy yielding better results.

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    Area of Science:

    • Laser Physics
    • Optoelectronics
    • Photonics

    Background:

    • Picosecond microchip lasers are crucial for various applications requiring short pulse durations.
    • Improving the efficiency and stability (reducing timing jitter) of these lasers is an ongoing research challenge.

    Purpose of the Study:

    • To enhance the efficiency of a picosecond microchip laser by optimizing the pumping configuration.
    • To reduce the timing jitter of the microchip laser using a self-injection seeding technique.

    Main Methods:

    • Utilized a continuous-wave (cw) 808 nm Ti:sapphire laser as the pump source.
    • Investigated different focal length pump focus lenses to maximize laser efficiency.
    • Implemented a self-injection seeding method by incorporating a seeding cavity to minimize timing jitter.

    Main Results:

    • Achieved a maximum slope efficiency of approximately 20% using a 30 mm focal length lens.
    • Observed a low pump threshold of only 13 mW.
    • Demonstrated a significant reduction in timing jitter, up to a factor of 23 compared to the unseeded laser.

    Conclusions:

    • Optimized pump focusing with a 30 mm lens significantly improves microchip laser efficiency.
    • Self-injection seeding is an effective method for drastically reducing timing jitter in picosecond lasers.
    • Higher seeding pulse energy correlates with greater timing jitter reduction.