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    We show how to compress infrared laser pulses using a multipass cell (MPC) with silica. This method achieves high pulse energy and duration control, overcoming limitations of self-focusing.

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    Area of Science:

    • Nonlinear Optics
    • Laser Physics
    • Materials Science

    Background:

    • Self-compression of ultrashort laser pulses is crucial for various scientific applications.
    • Conventional methods often face limitations in energy scaling and catastrophic self-focusing.
    • Multipass cells (MPCs) offer a potential platform for enhanced pulse manipulation.

    Purpose of the Study:

    • To demonstrate self-compression of short-wavelength infrared (SWIR) pulses within a multipass cell (MPC).
    • To investigate the feasibility of energy scaling for pulse self-compression techniques.
    • To control the spatial effects of Kerr nonlinearity during nonlinear propagation.

    Main Methods:

    • Utilizing a multipass cell (MPC) containing a silica plate for nonlinear propagation.
    • Operating in the anomalous dispersion regime to induce pulse self-compression.
    • Employing periodic focusing within the MPC to manage high peak powers.

    Main Results:

    • Achieved self-compression of 1550 nm pulses to 22 fs with 14 μJ energy at a 125 kHz repetition rate.
    • Successfully circumvented catastrophic self-focusing at peak powers of 440 MW, exceeding silica's critical power.
    • Demonstrated straightforward energy scaling and control over Kerr nonlinearity effects.

    Conclusions:

    • MPCs provide a viable and scalable platform for achieving high-energy pulse self-compression.
    • This technique offers enhanced control over temporal and spatial aspects of nonlinear pulse propagation.
    • MPCs can extend pulse manipulation capabilities, previously limited to waveguides, to higher energy levels.