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Waveoptical Simulation and Design of Laser Systems
Author: InfoCrops   Time: 2014-12-4 09:32:50

VirtualLab allows the electromagnetic analysis, design, optimization and tolerancing of laser systems. Simulated building blocks of laser systems include a laser source, several optical components, and one or more light detectors.

Source Modeling
VirtualLab is using a fully-vectorial light representation by electromagnetic fields. It provides the flexible simulation of different types of laser sources:
• Monomode lasers
• Multimode lasers
• Partially coherent lasers
• Excimer lasers
• Pulsed lasers
The fast and easy implementation of any light source is realized by:
• Import of measured laser modes
• Source catalog
• Customized programmable sources


Measured data import of realistic laser sources                     idealized source models

Simulation of Optical Systems
Based on unified optical modeling, the light propagation through complex optical systems can be simulated using different propagation models ranging from geometrical optics to physical optics. This smooth combination of different modeling techniques allows the analysis and design of optical setups including:
• Lenses
• Mirrors
• Prisms
• Freeform surfaces
• Apertures / stops
• Polarization optics
• Fresnel lenses
• Hybrid optics
• Scatterers
• Computer generated holograms (CGHs)
• Micro lens arrays
• Gratings
• Grin lenses
• Thin films
• High-NA optics
• Customized components


Toroidal freeform interface with aspherical parameters.

Diffractive optical element (DOE) structure.

Light Detection and Merit Functions
The evaluation of optical systems and definition of merit functions is most essential in practical optical modeling and design. Therefore VirtualLab’s advanced light representation by fully-vectorial electromagnetic fields gives access to all physical quantities, like:
• Intensity
• Wavefront, phase
• Polarization Aberrations (e. g. Zernike & Seidel)
• MTF & PSF
• Beam radius, M² and divergence angle
• Efficiency, uniformity error, stray light
• Radiometric and photometric detectors
• Customized definition of merit functions


Detection of coma aberration.

Optimization and Tolerancing
VirtualLab provides local and global parametric optimization algorithm for laser systems. Diffraction, interference, polarization effects and aberrations can be taken into account during the optimization. The customized definition of merit functions, that define the target of optimization problems, guarantees the flexibility in the optimization. Furthermore VirtualLab comes with a parameter run enabling simulation series, Monte Carlo simulation and position, tilt and fabrication tolerancing.


Local optimization in the solution space of a laser system.


Monte-Carlo simulation for tolerancing a laser beam shaping system.

Customization
Beside of the modeling and design capabilities, VirtualLab also provides a stable and convenient programming interface using C# or MATLAB code. This interface allows the customization of

• Light sources
• Interfaces
• Components
• Transmission and index modulated media
• Detectors and merit functions


Script programming using C# or MATLAB language.


by entering an analytical formula or using a more complex algorithms. This enables for example the fast modeling and evaluation of components with user defined freeform diffractive, refractive or hybrid surface profiles.
VirtualLab also allows to add user defined modeling techniques providing the most flexible and powerful field tracing experience ever. User defined solutions are based on programmable sources, components and detectors which can be used together with all modeling solutions already delivered with VirtualLab.


Customized optical modeling and design by field tracing.

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