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Higher order processes in random Raman lasing.

Brett H Hokr1, Joel N Bixler1, Vladislav V Yakovlev1

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Higher order stimulated Raman scattering (SRS) in random Raman lasers arises from long-path photons. Understanding these processes via simulations aids in identifying wave propagation effects in future experiments.

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Area of Science:

  • * Physics of Light Propagation
  • * Nonlinear Optics
  • * Condensed Matter Physics

Background:

  • * Random Raman lasers exhibit higher-order stimulated Raman scattering (SRS).
  • * These processes are linked to photons with the longest pathlengths and highest gain.
  • * Potential insights into wave propagation phenomena like coherent backscattering and optical Anderson localization.

Purpose of the Study:

  • * Investigate the occurrence and properties of higher-order SRS in random Raman lasers.
  • * Utilize Monte Carlo simulations to model these phenomena.
  • * Establish a theoretical baseline for experimental validation.

Main Methods:

  • * Monte Carlo simulations were employed.
  • * Focus on transport equation dynamics.
  • * Analysis of photon pathlengths and gain contributions.

Main Results:

  • * Simulations provide insights into the mechanisms of higher-order SRS.
  • * Predicted properties of these processes based on transport dynamics.
  • * Established a theoretical framework for understanding SRS in random media.

Conclusions:

  • * Higher-order SRS in random Raman lasers is primarily driven by long-path photons.
  • * Transport equation dynamics provide a foundational understanding.
  • * Future experiments can seek deviations to probe wave-like properties in random lasing.