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Modeling of Microlens Arrays and Diffraction at Apertures
Microlens arrays can be found in different applications, such as imaging, wavefront sensing, and so on.
With the physical-optics simulation technique in VirtualLab, the working principle of the microlens array, e.g. in the case of wavefront sensing, can be clearly demonstrated, and the performance of such systems can be evaluated efficiently. It is also worth mentioning that the diffraction effect from the edge of the individual microlenses can be taken into consideration in the simulation.
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Modeling of Microlens Arrays with Different Lens Shapes
The imaging properties of a microlens array with different lens shapes are investigated. Change of the focal spots with respect to aberration of input field is demonstrated.
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Advanced PSF & MTF Calculation for System with Rectangular Aperture
By placing a rotated rectangular aperture behind input fields with different sizes, the PSF and MTF in the focal plane are investigated.
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Evaluation of Fiber Coupling Lenses and Their Design
How to ensure a high-efficient coupling of light into optical fibers is an important question in all fiber-related applications.
In VirtualLab, the focal field behind the coupling lens can be easily calculated with the fast physical optics simulation engine, and by calculating the overlap integral, the fiber coupling efficiency can be evaluated. Additionally, with the parametric optimization, the lens parameter can be optimized for customized situations.
Parametric Optimization of Fiber Coupling Lens
With the parametric optimization in VirtualLab, the design of a fiber coupling lens with conical surfaces for efficient coupling into a single-mode fiber is presented.
Comparison of Different Lenses for Fiber Coupling
For the task of coupling light into a single-mode fiber, two commercially available lenses are selected, and their performance evaluated using the overlap integral.
Thermal Lens and Stress-Induced Birefringence
It is vital in design to be able to include in your simulation not only those properties or components that play an intentional, wanted role in the system, but also, and with particular care, those effects which have the potential to interfere with its intended purpose, in order to quantify and, if possible, avoid them.
Below we show two examples of VirtualLab’s potential in this area: all thanks to its fast and accurate approach, and an interface that allows you both to import measured data (from, e.g., ANSYS) or to include the effects via readily available or customized mathematical models.
Gaussian Beam Focused by a Thermal Lens
The variation of the focal length due to thermal lens effect and the changes of focal spot diameter are demonstrated with respect to the input laser power.
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Stress-Induced Birefringence in Laser Crystals
The stress-induced birefringence in a YAG crystal is investigated, by examining the change of output field with respect to the strength of stresses.
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