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Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing
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Terawatt KrF/Ti:sapphire hybrid laser system.

Y Nabekawa, K Kondo, N Sarukura

    Optics Letters
    |October 16, 2009
    PubMed
    Summary
    This summary is machine-generated.

    A terawatt hybrid laser system was developed, achieving high pulse contrast and 130 mJ energy output. An efficient frequency tripling method using Ti:sapphire was also demonstrated for ultrashort laser pulses.

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    Area of Science:

    • High-power laser systems
    • Nonlinear optics
    • Ultrafast science

    Background:

    • Development of terawatt laser systems is crucial for advanced research.
    • Achieving high contrast ratios in amplified spontaneous emission (ASE) is a key challenge.
    • Efficient frequency conversion is essential for tailoring laser pulse characteristics.

    Purpose of the Study:

    • To develop a terawatt KrF/Ti:sapphire hybrid laser system.
    • To achieve high contrast between amplified spontaneous emission and main pulses.
    • To demonstrate an efficient frequency-tripling scheme for ultrashort pulses.

    Main Methods:

    • Utilized a hybrid KrF/Ti:sapphire laser architecture.
    • Employed nonlinear crystals such as Lithium Triborate (LiB3O5) and Beta Barium Borate (β-BaB2O4) for frequency tripling.
    • Characterized pulse energy, duration, and contrast ratio.

    Main Results:

    • Developed a terawatt hybrid laser system with 130 mJ output energy in 130-fs pulses.
    • Achieved a high contrast ratio between amplified spontaneous emission and main pulses.
    • Demonstrated an 11% efficiency for frequency tripling in the 100-fs regime.

    Conclusions:

    • The developed hybrid laser system meets requirements for high-contrast, high-energy ultrashort pulse generation.
    • The demonstrated frequency-tripling scheme offers an efficient method for generating third-harmonic pulses.
    • This work advances capabilities in ultrafast laser technology for scientific applications.