LightTrans

What’s new?

Hybrid Lens Design for Correction of Aberrations

[September 28, 2022]
Hybrid lenses combine the advantages of classic refractive components and diffractive structures, and hence have become a promising approach.
[September 28, 2022]

Hybrid lenses combine the advantages of classic refractive components and diffractive structures, and hence have become a promising approach in different optical applications. In particular, the opposite signs of the dispersion for refractive and diffractive surfaces enable the correction of chromatic aberrations.

In order to model and design such a hybrid element accurately, the in-depth analysis of diffraction effects through the system is a necessity. VirtualLab Fusion’s fast physical optics propagation techniques allow for the accurate modeling of classic lenses and calculation of the diffraction efficiencies of the different orders of a diffractive lens.

To illustrate the capabilities of the software in this regard, we compare the models of a refractive and hybrid eyepiece. In this example, the propagation of light and the corresponding chromatic effects are investigated for on-axis as well as off-axis beams at different wavelengths.

Read more

Non-Sequential Modeling Etalons and Fabry-Pérot Resonators

[September 12, 2022]
We demonstrate the optical setup for the examination of sodium D lines with an etalon as the key component.
[September 12, 2022]

Optical etalons are utilized in various applications, for example in the field of spectroscopy and laser resonators. The basic configuration of an etalon just comprises a plan-parallel transparent plate and can form a well-known Fabry-Pérot resonator, which is usually used for spectral and/or angular selection.

VirtualLab Fusion’s non-sequential field tracing technique enables the accurate modeling of very different types of etalons, with either planar or curved surfaces in combination with high-reflective coatings. Further, the physical-optics modelling approach automatically includes vectorial effects and hence allows for the investigation of polarization effects on the interference pattern.

As a typical application, we demonstrate the optical setup for the examination of sodium D lines with an etalon as the key component.

Read more

Linearly Polarized (LP) Fiber Modes

[August 26, 2022]
We have prepared a deep-dive introduction to the tool itself as well as an example, which connects a multi-mode fiber with an aberrated optical system.
[August 26, 2022]

To conclude our series on fiber modeling, this week we introduce another set of tools that VirtualLab Fusion makes available to its users in this field. With the help of the linearly polarized (LP) Fiber Mode Calculator it is possible to generate and investigate the Bessel and Laguerre polynomials that describe the fiber modes propagating in multimode step- or graded-index fibers respectively.

The associated LP Mode source can be employed in combination with the Multiple Light Source to configure a finite set of these modes as the light source in an optical system, which would emulate the field exiting a given fiber. This enables the simulation of how the field exiting the fiber will propagate through the rest of a complex system and be transformed by it.

To showcase the capabilities of these features, we have selected, alongside a use case that covers the LP Fiber Mode Calculator in more detail, another example that demonstrates how a certain combination of aberrations deforms the shape of the modes emanating from our fiber source.

Read more
Tolerance Analysis of a Fiber Coupling Setup

Tolerance Analysis of Fiber-Coupling Systems

[August 18, 2022]
Analyze the coupling efficiency of a well-designed fiber-coupling lens and dive deep into the scanning mode for the Parameter Run in VirtualLab Fusion.
[August 18, 2022]

In our last newsletter we put the spotlight on the parametric optimization of a fiber-coupling setup to achieve maximum efficiency, employing the user-friendly tools put at your disposal by the fast physical optics modeling and design software VirtualLab Fusion. However, a good optical design in practice is not just characterized by the optimum combination of parameters that can maximize a specific merit function. Another key aspect is its robustness: as the conditions assumed in the design process cannot be perfectly met in a real-life environment, the logical next step is to analyze how small deviations in the system geometry influence the overall result.

For this purpose, the Parameter Run in VirtualLab Fusion allows the user to perform parameter sweeps. As an example, we analyze the coupling efficiency of a well-designed fiber-coupling lens with respect to different tolerance factors, such as the lateral shift of the fiber-end position and the tilt of the coupling lens. Furthermore, a deep-dive into the scanning mode for the parameter run, in which a two-dimensional area of the parameters space is investigated (with additional possibilities for the visualization of the results), is provided below.

Read more

Fiber Coupling Optimization

[August 12, 2022]
We demonstrate two examples where the working distance and the in-coupling lens are optimized using Parameter Run and Parametric Optimization.
[August 12, 2022]

Fibers are some of the most versatile components in modern optics. One of their most valued characteristics is their capacity to transport optical energy with very low losses over very long distances. On the flip side, coupling light into a fiber in a way that achieves as high an efficiency as possible is often a very delicate endeavor: selecting the right optical components for the coupling and aligning the system well are, among others, fundamental steps to ensure a satisfactory coupling efficiency.

The fast physical optics modeling and design software VirtualLab Fusion enables its users to simulate and optimize core components such as the incoupling lenses, in order to design the coupling system and analyze its performance and robustness. As an introduction to this topic, in this week’s newsletter, we demonstrate two examples where the working distance and the incoupling lens are optimized using VirtualLab Fusion’s Parameter Run and Parametric Optimization tools to increase the coupling efficiency of a single-mode fiber almost to 100%.

Read more

Thin-Film Structures for Photovoltaic Cells

[August 05, 2022]
In this newsletter we share an introduction of our Stratified Media Component, as well as a simulation of an setup for a CIGS-based solar cell.
[August 05, 2022]

Thin-film layer structures paired with strongly absorbing materials such as copper indium gallium selenide (CIGS) have been a stable technology for solar cell and photovoltaic applications for roughly three decades. To ensure as high an efficiency as possible, the optical engineer should optimize the materials used and layer thicknesses of the cell. To help with this task, the fast physical optics modeling and design software VirtualLab Fusion provides various tools, like the Stratified Media Component, that allow for an easy-to-use configuration of the layer system, as well as the ability to configure coating materials either by selecting them from our comprehensive in-built database, or by specifying their optical characteristics such as real part of the refractive index and absorption coefficient.

In this newsletter we share an introduction of our Stratified Media Component, as well as a simulation of an setup for a CIGS-based solar cell.

Read more

Grating based Monochromator for Spectroscopy

[July 29, 2022]
This week we present a classical Czerny-Turner monochromator and give a detailed insight into the properties of our grating component.
[July 29, 2022]

Spectroscopy – the study of the spectral (wavelength) composition of light – remains an important field of study in optics. Poly- or monochromators, which employ the dispersive behavior of diffractive elements to separate the different spectral components of incoming light in different directions, are often selected for this task because of their ease of use and adjustability.

The “connecting field solvers” approach implemented in the fast physical optics modeling and design software VirtualLab Fusion can simulate complex systems made up of a variety of components, as is the case in this field: gratings and refractive elements (such as parabolic mirrors) are both unavoidable parts of spectroscopic systems. This capacity of VirtualLab Fusion to simulate realistic, complex systems with its fully vectorial, fast physical optics engine offers the optical engineer invaluable tools for the task of designing and analyzing this kind of setups. As an example, this week we present a classical Czerny-Turner monochromator and give a detailed insight into the properties of our grating component.

Read more

Tools for the Analysis of Imaging Errors in Lens Systems

[July 18, 2022]
To assist the optical engineer, VirtualLab Fusion offers a number of powerful tools. In this newsletter, we would like to highlight the tool.
[July 18, 2022]

Imaging systems are one of the historical cornerstones of optics, with numerous applications in a wide range of different technologies. Therefore, the performance analysis of lens systems commonly used in imaging is a fundamental task for many optical engineers. To assist the optical engineer in this endeavor, VirtualLab Fusion offers a number of powerful tools.

In this newsletter, we would like to highlight, in particular, the tools for the analysis of field curvature and distortion. These two imaging errors stem from the fact that most detectors operate as plane surfaces, while lenses focus light onto a curve. These aberrations can be investigated with the easy-to-use integrated tools that VirtualLab Fusion puts at your disposal, as shown in the following examples.

Read more

Contact & Trial

LightTrans GmbH

Phone +49.3641.53129-50

info (at) lighttrans.com

 

VirtualLab Fusion

Get free trial version

Get an offer