Invitation to LASER World of PHOTONICS

(June 12, 2017)

Our teams at Wyrowski Photonics and LightTrans are operating at full stretch for the last sprint in the preparation for the LASER World of PHOTONICS, which is taking place in Munich from June 26 till 29, 2017. We are very excited to inform you that this event will mark the unveiling of our momentous...

New on Youtube: "Getting Started" VirtualLab Fusion Tutorials

(April 04, 2017)

The channel is a common platform of the Applied Computational Optics Group of the Institute of Applied Physics (Friedrich-Schiller-University), and the companies Wyrowski Photonics and LightTrans International. Here we will provide you with short videos on the theory and concepts of an exciting new ...

VirtualLab training courses in Jena in September 2017

(March 02, 2017)

LightTrans offers its new VirtualLab training courses: "Introduction to VirtualLab Fusion", September 18-19, 2017 "Analysis and Design of Diffractive and Micro Optical Systems”, September 20-22, 2017 NEW: "Introduction to VirtualLab Programming”, September 25, 2017 Deadli...

Laser Resonators Design

Analysis and Optimization of Laser Resonators

VirtualLab Fusion enables the calculation of transversal eigenmodes of complex laser resonators. The influence of plane and aspherical resonator end mirrors as well as plenty of intra-cavity components like sharp apertures, lenses, diffractive optical elements and freeform surfaces on the transversal resonator mode can be investigated. This enables the simulation of stable, unstable and ring resonator geometries and beam delivery systems for optical pumping. In addition the fully-vectorial Fox and Li algorithm enables the analysis of thermal lensing, stress-induced birefringence and nonlinear gain saturation for solid-state active media.


  • Solid-state laser resonators
    laser crystals, thermal lensing, birefringence, nonlinear gain saturation
  • Optical pumping
    diode pumped solid state (DPSS) lasers, design of optical pump systems, tolerancing
  • Unstable resonators
    non-Gaussian resonator modes, sharp intra-cavity apertures
  • Mode shaping
    intra- and extra-cavity mode shaping by diffractive and refractive optical elements

Applications and VirtualLab Fusion Toolboxes of Laser Resonators Design Package

The table shows which toolboxes of VirtualLab Fusion are recommended for each application. Please contact our sales team to discuss your specific requirements.

Further information can be found on the Starter Toolbox, Diffractive Optics Toolbox, and Laser Resonator Toolbox pages.

An additional overview of the features and required VirtualLab toolboxes is shown here.

Light amplification in active media (calculation of rate equations)

Laser Resonator Analysis by Field Tracing

Light evolution inside a stable resonator

The simulation of Resonators is based on VirtualLab’s field tracing concept which optimally combines various techniques for beam propagation ranging from geometrical optics to electromagnetic approaches. That allows the inclusion of several physical effects, which are important for transversal resonator eigenmodes. Typical effects are:

  • Diffraction
  • Polarization
  • Nonlinear light amplification (gain saturation)
  • Refractive index modulations (e. g. by thermal lenses)
  • Output power calculation

Intracavity Optical Components

Catalogs for surface profiles and media and customizable components provide a great flexibility for the definition of intracavity optical components in VirtualLab. The most important optical components are:

  • Lenses
  • Mirrors
  • Apertures
  • Gratings
  • Spatial filters for mode shaping
  • Diffractive and microstructured optical elements
  • Thermal lenses
  • Active media
  • Customized programmable components
Influence of intracavity thermal lens on dominant laser resonator mode

Optimization and Tolerancing

  • VirtualLab allows the local and global optimization of laser beam parameters (e.g. M² beam quality)
  • Furthermore VirtualLab can do a position and tilt tolerancing of laser resonators (including Monte-Carlo Simulations).
  • The design of micro-structured elements allows fundamental laser mode shaping inside of laser cavities.
Dominant mode of resonator with centric aperture
Laser resonator tolerancing: Dominant mode of resonator with off-centric aperture