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<p>In underwater ultrafast laser propagation and sensing, to solve the problem of pulse broadening and accurate calculation of dispersion parameters in pulse compression, an underwater ultrafast laser propagation model and pulse compression method is proposed. Starting from the Lorentz-Lorenz equation and the nonlinear Schrödinger equation, this paper considers the nonlinear effects of lasers and the dispersion in water to demonstrate a theoretical model for the beam propagation characteristics of underwater ultrafast laser. Furthermore, an optimization model is proposed for dispersion compensation and pulse compression based on nonlinear optimization. This method can predict the dynamic evolution of underwater ultrafast laser pulses and calculate the optimal dispersion parameter for pulse compression, offering significant theoretical and practical value for underwater laser sensing, laser imaging, and laser communication.</p>

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Ultrafast laser propagation and pulse compensation method for underwater laser sensing

  • 期刊论文

  • 发表日期：

    2026年4月25日

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  • Haotian Shi,
  • Yani Zuo,
  • Fangfei Wu,
  • Huifeng Zheng,
  • Hao Qiao,
  • Limeng Luo,
  • Xiaoyue Wang

摘要

In underwater ultrafast laser propagation and sensing, to solve the problem of pulse broadening and accurate calculation of dispersion parameters in pulse compression, an underwater ultrafast laser propagation model and pulse compression method is proposed. Starting from the Lorentz-Lorenz equation and the nonlinear Schrödinger equation, this paper considers the nonlinear effects of lasers and the dispersion in water to demonstrate a theoretical model for the beam propagation characteristics of underwater ultrafast laser. Furthermore, an optimization model is proposed for dispersion compensation and pulse compression based on nonlinear optimization. This method can predict the dynamic evolution of underwater ultrafast laser pulses and calculate the optimal dispersion parameter for pulse compression, offering significant theoretical and practical value for underwater laser sensing, laser imaging, and laser communication.