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The latest FRESNEL 4.0 is now capable to simulate nonlinear optics effects, such as self-focusing, second and third harmonic generation, and multipass schemes. All FRESNEL versions feature optimized modeling procedures, variety of input beams, optical elements and special resources, comfortable interface, extensive support options.


  • Effective Fast Fourier Transform wave propagation method with automatic scale adjustment to minimize computation errors;
  • Automatic magnification of beam spatial scale on apertures of optical elements to improve computation accuracy and minimize aliasing effect;
  • Permanent monitoring of the calculation accuracy;
  • Tightly optimized faster algorithms to handle beams at spatial discretization enhanced up to 8192x8192 points and temporal discretization up to 128 slices;
  • Fourier interpolation with arbitrary scaling factor;
  • Automatic allowance for the lens’ spherical aberrations of the beam with an arbitrary wavefront;
  • Automatic allowance for all kinds of tilted plane parallel plate aberrations;
  • Beam transforms - shift, rotation and reflection;
  • Nonlinear optics - self-focusing, second and third harmonic generation;
  • Amplifiers with nonuniform gain and OPD along X,Y,Z axes, multipass amplification schemes.


  • Hermit-Gaussian and Laguerre-Gaussian modes, Super Gaussian, Flat-topped and other;
  • Handling of user defined beams and pulse shapes;
  • Library of the optical components that includes nearly 50 elements:
     Sources: Flat-topped, Resonator mode, Super Gaussian, Diffraction pattern, Text file;
     Obstacles: Diaphragm, Mask, Obscuration, Dusted surface;
     Lenses: Thin lens, Lens, Lens (A);
     Telescopes: Spatial Filter, Beam expander;
     Amplifiers: Rod and Disk with nonuniform gain and phase aberration, Saturable absorber;
     Primary Aberrations: Astigmatism, Coma, Defocus, Spher.áAberr., Tilt;
     Phase Tools: Retarder, Phase deformation, Phase Screen, Deformable mirrors;
     XY Attenuation: Intensity and Amplitude attenuation and screen;
     Beam Transforms: Shift, Rotation, Reflection;
     Nonlinear Optics: Self-focusing, SHG type 1, SHG type 2, THG;
     Diagnostics: View screen, Interference, Plate;
     Coordinate grid: Grid control, Target, Auto magnification;
     Multipass Schemes: Turn Back Mirror, Base MPA, L-turn MPA, U-turn MPA;
  • Built in Beam profiler procedures recommended by ISO document #11146;
  • Wavefront metrology.


  • Intuitive-clear multi-windows graphic interface;
  • Assembling optical schemes using źdrag and drop╗ principle;
  • No need for user to learn any command language;
  • Full control on simulation process;
  • Comprehensive interactive beam analysis during computation including beam profiling and zoom, phase and amplitude retrieval;
  • Magnification mode for detailed beam examination;
  • Powerful Beam analyzer tool;
  • Data export to other Windows applications (e.g. MS Excel, MathCad);
  • Black-and-white or pseudo color layouts, linear and logarithmic scale;


  • Detailed build-in help;
  • Comprehensive User's Guide;
  • Quick Guide with a package of valuable examples;
  • During 6 months after purchase :
    - Technical consultations concerning application of the program in user computations (free of charge);
    - Correction of all detected malfunctions of  FRESNEL code (free of charge);
    - Priority to order development of  any additional elements or options user needs (under separate contract).