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Pulse-width-tunable 0.7 W mode-locked Cr: forsterite laser.

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    A novel mode-locked chromium forsterite laser generates ultrashort pulses (40-200 fs) at 1.25 μm. Its dynamics reveal spectral and temporal breathing, enabling advanced bio-imaging and laser technologies.

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    Area of Science:

    • Laser Physics
    • Nonlinear Optics
    • Ultrafast Science

    Background:

    • Mode-locked lasers are crucial for generating ultrashort optical pulses.
    • Chromium forsterite lasers offer unique wavelength capabilities.
    • Understanding pulse dynamics is key for optimizing laser performance.

    Purpose of the Study:

    • To demonstrate a mode-locked chromium forsterite laser with tunable ultrashort pulse output.
    • To investigate the pulse buildup dynamics in this laser system.
    • To highlight the potential applications of the developed laser source.

    Main Methods:

    • Utilized a mode-locked chromium forsterite laser configuration.
    • Characterized output power, central wavelength, repetition rate, and pulse width.
    • Analyzed spectral and temporal pulse dynamics.

    Main Results:

    • Achieved output power > 0.7 W at 1.25 μm.
    • Demonstrated tunable pulse width from 40 to 200 fs.
    • Observed spectral and temporal breathing due to gain, Kerr nonlinearity, and dispersion.

    Conclusions:

    • The developed laser provides tunable ultrashort pulses at 1.25 μm.
    • Pulse dynamics are governed by a complex interplay of optical effects.
    • The laser is a promising tool for nonlinear bio-imaging and high-power laser systems.