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Dy(2+):CaF(2) saturable-absorber Q switch for the ruby laser.

Y K Kuo, W Chen, R D Stultz

    Applied Optics
    |October 14, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Researchers demonstrated passive Q switching of a ruby laser using a Dy(2+):CaF(2) saturable absorber. This method produced a single Q-switched pulse with 4.5 mJ energy and 94 ns duration at room temperature.

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    Area of Science:

    • Lasers and Photonics
    • Materials Science

    Background:

    • Passive Q switching is a technique to generate high-energy laser pulses.
    • Ruby lasers are historically significant solid-state lasers.
    • Saturable absorbers are crucial for Q switching, modulating laser output.

    Purpose of the Study:

    • To demonstrate passive Q switching of a flash-lamp-pumped ruby laser.
    • To investigate the efficacy of Dy(2+):CaF(2) as a saturable absorber.
    • To characterize the optical properties of the Dy(2+):CaF(2) absorber.

    Main Methods:

    • Utilized a flash-lamp-pumped ruby laser.
    • Employed a Dy(2+):CaF(2) crystal as a saturable absorber at room temperature.
    • Analyzed the output pulse characteristics (energy, duration) and absorption cross sections.

    Main Results:

    • Successfully achieved passive Q switching.
    • Observed a typical single Q-switched pulse of 4.5 mJ energy and 94 ns duration.
    • Determined ground-state and excited-state absorption cross sections of 1.2 × 10(-18) cm(2) and 0.9 × 10(-18) cm(2) at 694 nm.
    • Modeled the absorber behavior using a four-level slow-relaxing saturable-absorber model.

    Conclusions:

    • Dy(2+):CaF(2) is an effective saturable absorber for passive Q switching of ruby lasers.
    • The material properties are suitable for generating nanosecond pulses.
    • Further research can explore optimized configurations for enhanced performance.