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Nonlinear combining of laser beams.

Pavel M Lushnikov, Natalia Vladimirova

    Optics Letters
    |July 1, 2014
    PubMed
    Summary

    Multiple laser beams combine into one diffraction-limited beam using self-focusing in a Kerr medium. This process leverages near-field combination and nonlinear optical fiber propagation to achieve a high-quality output beam.

    Area of Science:

    • Nonlinear Optics
    • Laser Physics
    • Wave Propagation

    Background:

    • Combining multiple laser beams into a single high-quality beam is challenging.
    • Self-focusing in nonlinear media offers a potential pathway for beam combination.

    Purpose of the Study:

    • To demonstrate combining multiple laser beams into a single diffraction-limited beam.
    • To utilize beam self-focusing (collapse) in a Kerr medium for beam combination.

    Main Methods:

    • Combining beams in the near field.
    • Propagating combined beams in an optical fiber with Kerr nonlinearity.
    • Utilizing random fluctuations to trigger self-focusing.

    Main Results:

    • Achieved combination of multiple laser beams into a single diffraction-limited beam.

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  • Demonstrated self-focusing (collapse) in a Kerr medium.
  • The resulting beam carried the critical power.

    • Conclusions:

    • Beam self-focusing in nonlinear optical fibers is an effective method for combining multiple laser beams.
    • This technique produces a high-quality, diffraction-limited output beam.
    • The process is initiated by random fluctuations during propagation.