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Investigation of Dispersion Effects on Ultrashort Pulses

[January 24, 2022]
In order to emphasize the capabilities of the fast physical optics software VirtualLab Fusion in this particular field of optics, we demonstrate two examples: We investigate the behavior of a pulse while propagating through different materials. We also demonstrate the capabilities of VirtualLab Fusion’s Pulse Evaluation detector.
[January 24, 2022]

In modern optical systems ultrafast phenomena are often applied in a wide variety of applications. Due to the large spectral bandwidth of such short pulses, dispersion effects play a major role in the design and analysis of those systems. Hence, to ensure an accurate and suitable modeling, all dispersion effects in the system have to be considered, adequately. In order to emphasize the capabilities of the fast physical optics software VirtualLab Fusion in this particular field of optics, we demonstrate two examples: In the first one, we investigate the behavior of a pulse while propagating through different materials, and illustrate the corresponding dispersion-related effects. We also use this example to demonstrate the capabilities of VirtualLab Fusion’s Pulse Evaluation detector. In the second example, we investigate dispersion effects occurring by reflection at dielectric- or metallic-coated mirrors.

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Save Your Seat for Our First Webinar and Meetup in 2022 on Lightguides for AR & MR

[January 19, 2022]
Take the opportunity to attend in our Webinar and Meetup in February. During our events, you have the chance to learn more about one of the most exciting developments in optical engineering - light guides for augmented and mixed reality.
[January 19, 2022]

Webinar
Analysis and Optimization of Lightguides for Augmented & Mixed Reality
16 February 2022 | 10:00 and 18:00 (CET)

User Meetup
Lightguides for AR & MR with Holographic and Surface-Relief Grating Couplers
23 February 2022 | 10:00 – 17:45 (CET)

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Optimization of Grating Geometries in Lightguide Systems

[December 10, 2021]
We address a closely related step in the design workflow: the optimization of the grating geometries used in the coupling and expansion regions of the system. VirtualLab Fusion offers a series of powerful tools for this task.
[December 10, 2021]

In our last newsletter we highlighted the capabilities of the fast physical optics software VirtualLab Fusion to analyze the performance of lightguide systems. This time we address a closely related step in the design workflow: the optimization of the grating geometries used in the coupling and expansion regions of the system.

VirtualLab Fusion offers a series of powerful tools for this task: for instance, detectors that calculate fundamental merit functions like uniformity and efficiency, and moreover the possibility to implement a (custom) smooth variation of the grating parameters along a specific region of the layout. The latter approach can drastically decrease the number of free parameters in the optimization while at the same time retaining crucial flexibility. For more information, check out the examples below!

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Performance Investigation of Lightguide Systems

[December 03, 2021]
We demonstrate two examples centered around the performance evaluation of lightguides: an NED (“near to exe”) device with 2D pupil expansion and a human eye model in order to calculate the MTF & PSF, and another one on characterization of the lateral uniformity.
[December 03, 2021]

The design process of any optical system must include an investigation of the performance of the system as a crucial step. Of course, this includes lightguide devices for applications in the field of augmented and mixed reality (AR/MR), as relatively complex representatives of optical systems. Depending on the application, “performance” can be defined by different merit functions. VirtualLab Fusion provides the optical engineer with a set of helpful tools and detectors to investigate the properties of the system.

Below we demonstrate two examples centered around the performance evaluation of lightguides: an NED (“near to exe”) device with 2D pupil expansion and a human eye model in order to calculate the MTF & PSF, and another one on characterization of the lateral uniformity.

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Footprint and Grating Analysis

[November 30, 2021]
This time, we want to highlight the Grating Order Analyzer, which uses the rigorous Fourier Modal Method/Rigorous Coupled Wave Analysis (FMM/RCWA) for grating characterization and illustrate its application in the case of a slanted grating for lightguide incoupling.
[November 30, 2021]

The Light Guide Toolbox of the fast physical optics software VirtualLab Fusion provides a series of tools to help the optical engineer with many of the different stages involved in the design of lightguide devices for augmented and mixed reality applications. In our recent newsletters we already covered some of the features that assist, for instance, in the determination of a sufficient layout for the lightguide and its grating regions.

Today we turn to one of the most powerful systematic design tools for gratings in lightguides: the Footprint and Grating Analysis tool. Among its many functions, which are not limited to any particular layout, it can help, for example, to visualize the interactions of the beam footprints with the grating regions for the different field-of-view modes – an important study, considering the complex propagation of light inside the lightguide. But the jewel in its crown is its capacity to perform an analysis of the grating behavior that can then be used to configure a smooth variation of the grating parameters inside a single grating region, with the aim of improving the performance of the device in terms of its uniformity and efficiency.

Learn more about it with the use cases below!

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