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2 results

  • 5 - Nonlinear Optical Interactions

  • Jia-Ming Liu, University of California, Los Angeles
  • Book:
    Nonlinear Photonics
    Published online:
    05 January 2022
    Print publication:
    06 January 2022, pp 109-142

  • Summary

    Optical interactions can generally be categorized into parametric processes and nonparametric processes. A parametric process does not cause any change in the quantum-mechanical state of the material, whereas a nonparametric process causes some changes in the quantum-mechanical state of the material. Phase matching among interacting optical fields is not automatically satisfied in a parametric process but is always automatically satisfied in a nonparametric process. All second-order nonlinear optical processes are parametric in nature. The nonlinear polarization and phase-matching condition of each second-order process are discussed in the second section. Some third-order nonlinear optical processes are parametric, and others are nonparametric. The nonlinear polarization and phase-matching condition of each third-order process are discussed in the third section.