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| Term | Definition |
|---|---|
| SHG | Second Harmonic Generation |
| CW | Continuous Wave |
| G | Gaussian |
Article title:
Heat coupled Gaussian continuous-wave double-pass type-II second harmonic generation: inclusion of thermally induced phase mismatching and thermal lensing
Table of Contents
This repository contains the Computational Toolkit for Heat Coupled Gaussian Continuous-Wave Double-Pass Type-II Second Harmonic Generation, an open-source Fortran implementation developed to solve the thermal effects problem described in the research article: "Heat coupled Gaussian continuous-wave double-pass type-II second harmonic generation: inclusion of thermally induced phase mismatching and thermal lensing"
This toolkit implements the eight-coupled equation model that simultaneously solves the thermal effects in type II second harmonic generation (SHG) of Gaussian continuous-wave (CW) in a double-pass cavity. The model includes thermally induced phase mismatching (TIPM) along with thermal lensing through the interposing of heat and TIPM equations.
The toolkit provides:
- Eight-coupled equation solver for simultaneous solution of SHG, heat, and TIPM equations
- Double-pass cavity simulation with proper boundary conditions and mirror reflectivities
- Thermal effects modeling including temperature distribution and phase mismatching
- Time evolution analysis from transient to steady-state conditions
- Gaussian beam propagation with absorption and thermal effects
- KTP crystal properties with temperature-dependent material parameters
- Home-computer compatible numerical procedures for efficient computation
The implementation has been validated by reproducing experimental data with excellent agreement, as reported in the research article. The model successfully demonstrates how SHG is affected in time when heat is generated in the crystal, providing crucial insights into thermal limitations in continuous-wave second harmonic generation systems. This toolkit was specifically developed to solve the thermal modeling problem described in the research article and provides a complete computational framework for analyzing thermal effects in double-pass SHG systems.
Folder PATH listing
+---citation <-- Reference documents and citations
│ 1_Heat-Equation_Continu… <-- Heat equation analytical solution
│ 2_Heat-Equation_Continu… <-- Heat equation continuous wave
│ 3_Heat-Equation_Pulsed-… <-- Heat equation pulsed wave
│ 4_Phase-Mismatch_Pulsed… <-- Phase mismatch analysis
│ 5_Ideal_Continuous-Wave… <-- Ideal continuous wave study
│ 6_Ideal_Pulsed-Wave_Bes… <-- Ideal pulsed wave Bessel
│ 7_Coupled_Continuous-Wa… <-- Coupled continuous wave
│ README.md <-- Citation documentation
│
+---images <-- Visual assets and graphics
│ SHG-banner.png <-- Project banner image
│
+---results <-- Computational output data
│ Psi_12_m_r.plt <-- Psi field mode 12 minus radial
│ Psi_12_m_z.plt <-- Psi field mode 12 minus axial
│ Psi_12_p_r.plt <-- Psi field mode 12 plus radial
│ Psi_12_p_z.plt <-- Psi field mode 12 plus axial
│ Psi_22_m_r.plt <-- Psi field mode 22 minus radial
│ Psi_22_m_z.plt <-- Psi field mode 22 minus axial
│ Psi_22_p_r.plt <-- Psi field mode 22 plus radial
│ Psi_22_p_z.plt <-- Psi field mode 22 plus axial
│ Psi_32_m_r.plt <-- Psi field mode 32 minus radial
│ Psi_32_m_z.plt <-- Psi field mode 32 minus axial
│ Psi_32_p_r.plt <-- Psi field mode 32 plus radial
│ Psi_32_p_z.plt <-- Psi field mode 32 plus axial
│ ST_85_time_01_p_r.plt <-- ST time series pressure radial
│ ST_85_time_01_p_t.plt <-- ST time series pressure theta
│ ST_85_time_01_p_z.plt <-- ST time series pressure axial
│ ST_85_time_01_T_r.plt <-- ST time series temperature radial
│ ST_85_time_01_T_t.plt <-- ST time series temperature theta
│ ST_85_time_01_T_z.plt <-- ST time series temperature axial
│
+---src <-- Source code and implementation
│ Code_SHG-CW-G-Coupled.… <-- Main Fortran simulation code
│
│ Article_SHG-CW-G-Coupl… <-- Main research article PDF
│ CITATION.cff <-- Citation metadata file
│ LICENSE <-- Project license information
│ README.md <-- Project documentation
- Fortran Compiler (gfortran, Intel Fortran, or similar)
- Text Editor (VS Code, Cursor, or any Fortran-capable editor)
- PDF Reader (for accessing research papers and documentation)
- Git (for cloning the repository)
- Make (for building the project, optional but recommended)
-
Clone the repository
git clone https://github.com/Second-Harmonic-Generation/SHG-CW-G-Fields-Coupled.git cd SHG-CW-G-Fields-Coupled -
Explore the Research Papers
- Open
Article_SHG-CW-G-Coupled.pdffor the main research article - Review the
citation/folder for supporting references - Read the
README.mdfiles in each subdirectory for detailed explanations
- Open
-
Compile and Run the Code
cd src/ gfortran -o shg_simulation Code_SHG-CW-G-Coupled.f90 ./shg_simulation -
Analyze Results
- Check the
results/folder for generated plot data files (.plt format) - Use your preferred plotting software to visualize the results
- Compare with the theoretical predictions in the research papers
- Check the
-
Development Workflow
- Edit the Fortran source code in
src/Code_SHG-CW-G-Coupled.f90 - Modify parameters as needed for your specific analysis
- Recompile and run to generate new results
- Document your findings and modifications
- Edit the Fortran source code in
Please refer to the citation folder for accurate citations. It contains essential guidelines for accurate referencing, ensuring accurate acknowledgement of our work.
For questions not addressed in the resources above, please connect with Mostafa Rezaee on LinkedIn for personalized assistance.