Multi-Pulse Interference Analyzer

A web-based tool for simulating and analyzing the temporal and spectral interference patterns of multiple laser pulses with customizable dispersion characteristics.

🚀 Live Demo

Try the tool online: https://visuphy.org/MultiPulseInterference

📋 Features

• Multi-Pulse Simulation: Analyze up to 6 laser pulses simultaneously
• Flexible Pulse Shapes:
  • Gaussian
  • Sech² (hyperbolic secant squared)
  • Custom imported spectral shapes from CSV files
• Comprehensive Parameters:
  • Central wavelength and bandwidth
  • Amplitude control
  • Phase coefficients (φ₀ through φ₄) for modeling various dispersion effects
• Visualization Options:
  • Individual pulse temporal intensities
  • Total temporal intensity (interference pattern)
  • Spectral intensity interference
  • Intensity autocorrelation trace
• Interactive Controls:
  • Adjustable grid size for simulation resolution
  • Customizable axis ranges for all plots
  • Real-time coordinate display on hover

🛠️ Installation

Prerequisites

• Python 3.7 or higher
• pip (Python package installer)

Local Setup

1. Clone the repository:

git clone https://github.com/visuphy/MultiPulseInterference.git
cd MultiPulseInterference

2. Create a virtual environment (recommended):

python -m venv venv
source venv/bin/activate  # On Windows: venv\Scripts\activate

3. Install dependencies:

pip install -r requirements.txt

🎮 Usage

Running Locally

For local development with the proper URL structure:

python run_local.py

Then navigate to:

• Intro page: http://localhost:5000/MultiPulseInterference/
• Tool page: http://localhost:5000/MultiPulseInterference/tool

Using the Tool

1. Add Pulses: Click "Add Pulse" to create new pulse configurations (up to 6)
2. Configure Parameters:
   • Set central wavelength (nm) and bandwidth FWHM (nm)
   • Adjust amplitude (arbitrary units)
   • Configure phase coefficients:
     • φ₀: Carrier-Envelope Phase (CEP) in radians
     • φ₁: Group Delay (time delay) in fs
     • φ₂: Group Delay Dispersion (GDD) in fs²
     • φ₃: Third-Order Dispersion (TOD) in fs³
     • φ₄: Fourth-Order Dispersion (FOD) in fs⁴
3. Import Custom Spectra (optional):
   • Select "Import from file" as the spectrum shape
   • Upload a CSV file with wavelength and intensity columns
   • Configure import settings (delimiter, header rows, scaling)
4. Adjust Simulation Settings:
   • Grid size (2^N points) - higher values give better resolution
   • Axis ranges for temporal, spectral, and autocorrelation plots
5. Run Simulation: Click "Run Simulation" to generate the analysis plots

📊 Output Plots

The tool generates four synchronized plots:

1. Temporal Intensity of Individual Pulses: Shows each pulse's intensity profile in time domain
2. Total Temporal Intensity: Displays the interference pattern from all pulses combined
3. Spectral Intensity: Shows the combined spectrum in wavelength domain
4. Intensity Autocorrelation: Useful for pulse characterization and measurement comparison

🔧 Technical Details

• Backend: Flask (Python web framework)
• Computation: NumPy for FFT operations, SciPy for interpolation
• Visualization: Matplotlib with Agg backend for server-side rendering
• Frontend: Vanilla JavaScript with responsive design

Grid Size Considerations

• Default: 2^16 = 65,536 points
• Maximum (online version): 2^22 = 4,194,304 points
• For unlimited grid size, run locally with APP_ENV=development

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

👥 Authors

• Original Author: Hussein-Tofaili
• Hosted by: VisuPhy

🤝 Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

1. Fork the repository
2. Create your feature branch (git checkout -b feature/AmazingFeature)
3. Commit your changes (git commit -m 'Add some AmazingFeature')
4. Push to the branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

🐛 Issues

If you encounter any problems or have suggestions, please open an issue on GitHub.

📝 Citation

If you use this tool in your research, please cite:

Multi-Pulse Interference Analyzer
https://github.com/visuphy/MultiPulseInterference
© 2025 VisuPhy