SOFTWARE GRATING SOLVER
Design and simulation of diffraction gratings using electromagnetic theory.

1. Simulation of reflection and transmission diffraction gratings with continuous and binary relief profile
2. Gradient methods and stochastic algorithms for solving the inverse problem of calculating the binary relief to generate desired diffraction orders
3. Gradient methods for solving the inverse problem of calculating the continuous profile reflection using the Rayleingh approximation.

Developed: DĪL. Adopted at the FIAT Research Center.

The PC display exemplifies the calculation of binary reflection gratings by a 9-order grating with 3 grooves. With this method, the grooves coordinates (xi, ci, hi) are optimized via minimizing the residual funchion for calculated and desired order intensities.

  1. Physical parameters of the problem
  2. Profile optimization parameters
  3. Window of calculated binary profile parameters
  4. Calculated and desired order intensities
  5. Optimization type (gradient or random search)
  6. Grating performances (energy efficiency, rms error, residual function)