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<p>We present a four-channel prototype of a system for spatial convergence and coherent addition of tightly focused femtosecond laser beams in counter-propagating geometry. During the interference of the individual laser channels in the main focus of the system a standing laser field configuration close in its structure to the dipole focusing underlying the design of the exawatt XCELS project is realized. The prototype uses radiation from a pulsed femtosecond laser source operating at a repetition rate of about 80 MHz without additional amplification inside the laser circuit. A two-stage system for stabilizing the laser radiation direction at the input to the convergence circuit, as well as the phase stabilizing system for four beams are developed and tested.</p>

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Low-Power Four-Channel Optical Scheme of Coherent Addition of Optic Pulses for the Xcels Project

  • 期刊论文

  • 发表日期：

    2025年4月1日

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  • K. F. Burdonov,
  • A. A. Soloviev,
  • R. S. Zemskov,
  • I. I. Kuznetsov,
  • I. B. Mukhin,
  • A. E. Pestov,
  • A. A. Shaikin,
  • M. V. Starodubtsev,
  • E. A. Khazanov

摘要

We present a four-channel prototype of a system for spatial convergence and coherent addition of tightly focused femtosecond laser beams in counter-propagating geometry. During the interference of the individual laser channels in the main focus of the system a standing laser field configuration close in its structure to the dipole focusing underlying the design of the exawatt XCELS project is realized. The prototype uses radiation from a pulsed femtosecond laser source operating at a repetition rate of about 80 MHz without additional amplification inside the laser circuit. A two-stage system for stabilizing the laser radiation direction at the input to the convergence circuit, as well as the phase stabilizing system for four beams are developed and tested.