NEWS

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...

Free optical design seminar at Photonics West 2017

(December 19, 2016)

LightTrans is going to exhibit at Photonics West 2017 taking place in San Francisco, CA, starting on January 31, 2017. Please visit us at our booth 4629-45 in the German Pavilion during the trade show (January 31 - February 2). During the week of the trade show we offer a free optical design semina...

Flexible eigenmode analysis of laser resonators

The VirtualLab Laser Resonator Toolbox allows the analysis of eigenmodes of stable and unstable laser resonators. The analysis includes the calculation of fundamental modes, higher order modes and eigenvalues. It is based on field tracing which optimally combines various techniques for beam propagation ranging from geometrical optics to electromagnetic approaches. That allows for instance the inclusion of microstructures and DOEs inside the cavity, the simulation of index modulations of the active medium and of arbitrary shapes of fundamental modes. Catalogs for surface profiles and media and customizable components provide a great flexibility for the definition of resonators in VirtualLab. Tolerance simulations enable the investigation of the stability of a resonator.

Your Benefit

M² beam parameter of the fundamental mode for varying size of an aperture.
  • Compute eigenmodes, both fundamental and higher modes, and eigenvalues of resonator systems.
  • Stable and unstable cavities.
  • Simulate micro-structured mirrors and diffractive optical elements as part of the resonator. Customized apertures are available.
  • Import resonator systems from LASCAD for analysis with VirtualLab field tracing.
  • Perform tolerance analysis of the resonator by parameter variation.
  • Tolerance analysis of the resonator by parameter variation.
  • Compute outcoupling modes and use them as source in exterior optical systems (Starter Toolbox required).

Selected Features

Eigenmode analysis including higher modes. VirtualLab provides two algorithms for analyzing resonators: the Fox-Li and the Arnoldi algorithm. The buildup of laser oscillation can be shown. Fundamental and higher eigenmodes and eigenvalues can be computed. The convergence of the algorithms is controlled and can be checked by a deviation detector.


Beam Parameter, M² calculation and parameter run. VirtualLab provides a variety of detectors including those for beam parameters and M². These detectors can be positioned in the resonator. Using the parameter run parameters of the resonator components can be varied automatically. This allows a tolerance analysis of the resonator system.

Great variety of optical interfaces and media. VirtualLab comes with catalogs for materials, media, optical interfaces and coatings. These can be used to build up resonator systems. Examples are conical, aspherical and polynomial interfaces, homogeneous and GRIN media. Further, interfaces and media are programmable or can be described by imported sampled data.

Micro-structured mirrors and diffractive optical elements. VirtualLab supports the simulation of micro-structured elements as part of the resonator. Components like customized mirror functions and diffractive optical elements are available. In practice, those micro-structured elements can be used to design resonators with pre-defined eigenmodes, e.g., Top Hat modes.

Import of LASCAD resonator systems. VirtualLab supports the import of resonator systems from LASCAD. It is possible to import thermal lenses and the corresponding refractive index data. The analysis of such resonators in VirtualLab uses combined simulation techniques including geometrical optics and split-step beam propagation methods.