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Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
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Self-mode-locked diode-pumped Cr:LiSAF laser.

M J Dymott, A I Ferguson

    Optics Letters
    |October 27, 2009
    PubMed
    Summary

    We developed a tunable, all-solid-state laser using a diode laser pump, achieving ultrashort pulses. This self-mode-locked Cr:LiSAF laser offers high performance for various applications.

    Area of Science:

    • Laser physics
    • Solid-state optics
    • Ultrafast optics

    Background:

    • Diode-pumped lasers offer compact and efficient solutions for various scientific applications.
    • Achieving ultrashort pulse durations requires precise control over laser cavity dynamics.
    • Cr:LiSAF (chromium-doped lithium strontium aluminum fluoride) is a promising gain medium for tunable lasers.

    Purpose of the Study:

    • To demonstrate an all-solid-state tunable self-mode-locked laser.
    • To achieve ultrashort pulse generation using a diode laser pump.
    • To outline design considerations for low-threshold diode-pumped lasers.

    Main Methods:

    • Utilized a single 250-mW laser diode for pumping.
    • Implemented a regeneratively driven acousto-optic modulator for self-mode-locking initiation.

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  • Incorporated a hard aperture (adjustable slit) within the laser cavity.

    • Main Results:

    • Generated almost-bandwidth-limited pulses with a duration of 97 femtoseconds (fs).
    • Achieved self-mode-locking using a diode pump source.
    • Demonstrated a tunable, all-solid-state laser system.

    Conclusions:

    • The developed Cr:LiSAF laser system provides a compact and efficient source of ultrashort pulses.
    • The design principles are applicable to developing other low-threshold self-mode-locked diode-pumped lasers.
    • This technology has potential applications in spectroscopy, nonlinear optics, and optical communications.