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Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing
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Picosecond laser system continuously tunable in the 0.6-4-microm range.

H Vanherzeele

    Applied Optics
    |June 22, 2010
    PubMed
    Summary

    A new tunable picosecond laser system offers both continuous-wave and pulsed modes with a wide 0.6-4 micrometer tuning range. This synchronized system provides flexible pulse durations and milliwatt-level power for diverse applications.

    Area of Science:

    • Optics and Photonics
    • Laser Physics
    • Nonlinear Optics

    Background:

    • Picosecond laser systems are crucial for various scientific and industrial applications requiring precise temporal resolution.
    • Existing tunable laser systems often face limitations in terms of tuning range, pulse duration flexibility, or simultaneous mode operation.

    Purpose of the Study:

    • To develop a continuously tunable picosecond laser system with enhanced operational flexibility.
    • To achieve a broad tuning range (0.6-4 micrometers) in both continuous-wave (cw) and pulsed modes.
    • To enable simultaneous and synchronized operation of both cw and pulsed modes.

    Main Methods:

    • Development of a laser system based on a mode-locked high-power Neodymium-doped Yttrium Lithium Fluoride (Nd:YLF) laser.

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  • Synchronous pumping of a dye laser and seeding of a Nd:YLF regenerative amplifier.
  • Utilizing frequency mixing and parametric generation/amplification in Potassium Titanyl Phosphate (KTiOPO4) crystals for broad tunability.

    • Main Results:

    • A continuously tunable picosecond laser system operating in both cw (100 MHz) and pulsed (10 Hz) modes was successfully developed.
    • The system exhibits a consistent tuning range of approximately 0.6-4 micrometers across both operational modes.
    • Flexible pulse durations (5 ps and 50 ps) are available, with synchronized simultaneous operation of cw and pulsed modes.
    • Average output power is in the milliwatt range for both repetition rates.

    Conclusions:

    • The developed laser system offers unprecedented flexibility and performance for tunable picosecond light generation.
    • The synchronized dual-mode operation (cw and pulsed) broadens the applicability of the system.
    • This versatile laser platform is suitable for advanced research in spectroscopy, nonlinear optics, and materials processing.