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Modeling and optimization of third-harmonic generation with dual-wavelength injection
Optics Express
|May 4, 2026
Summary
Dual-wavelength injection enhances spectral broadening for stimulated rotational Raman scattering (SRRS) ultraviolet output. Optimizing energy ratios and crystal angles balances efficiency and spectral width, advancing laser-plasma instability suppression.
Area of Science:
- Nonlinear optics
- Laser physics
- Plasma physics
Background:
- Stimulated rotational Raman scattering (SRRS) with signal-beam injection achieves kilojoule-level UV output exceeding 1% bandwidth.
- This technique shows promise for mitigating laser-plasma instabilities.
Purpose of the Study:
- To enhance spectral broadening in SRRS by investigating third-harmonic generation (THG) under dual-wavelength injection.
- To develop a theoretical model for THG under dual-wavelength injection and analyze its effects on spectral properties.
Main Methods:
- Developed a coupled-wave dynamical model for THG under dual-wavelength injection.
- Performed numerical simulations to analyze the influence of energy ratio and crystal detuning angle.
Main Results:
- Dual-wavelength injection in THG generates multiple spectral components, enhancing spectral broadening.
- Optimized dual-wavelength energy ratio and crystal detuning angle achieve a balance between conversion efficiency and spectral broadening.
Conclusions:
- The study provides a theoretical framework for harmonic generation with dual-wavelength injection.
- This approach offers potential for improved SRRS spectral broadening and multi-line frequency generation, aiding laser-plasma instability research.
