- COMSOL MULTIPHYSICS TUTORIALS HOW TO
- COMSOL MULTIPHYSICS TUTORIALS PDF
- COMSOL MULTIPHYSICS TUTORIALS REGISTRATION
- COMSOL MULTIPHYSICS TUTORIALS SOFTWARE
Micromixer – 3D model (from COMSOL site): Piezoelectric Shear Bender - COMSOL Modeling (Screencast) Other COMSOL Models not covered in the class : Piezoelectric Shear Bender - Introduction (Screencast)
COMSOL MULTIPHYSICS TUTORIALS PDF
Instructions: comsol-mems-energy-harvester.pdfĮnergy Harvester – Introduction (Screencast)Įnergy Harvester – COMSOL Modeling (Screencast) Piezoelectric Shear Bender:įor Piezoelectric actuator, download the PDF for COMSOL 5.2 from:Ĭlick on "Download the Application Files" and download _bender.pdf. We also recommend you visit this page to find out about schedule changes and the latest information about the tutorial.Ĭomsol-mems-micromixer.pdf MEMS Energy Harvester:
COMSOL MULTIPHYSICS TUTORIALS REGISTRATION
As spacing is limited to only 17 students, registration is strongly recommended. Topics discussed include direct-current, small-signal, and transient analyses of diodes and transistors optoelectronic devices ion.
COMSOL MULTIPHYSICS TUTORIALS SOFTWARE
Place: Pierce 12 A, 29 Oxford St, Cambridge, MA 02138 Take a look at this video to learn about the Semiconductor Module, an add-on product to the COMSOL Multiphysics software that has dedicated functionality for semiconductor device physics simulations. Piezoelectric Shear Bender (Electrostatics, Solid Mechanics)įor those who could not attend the second tutorial on, the model instructions and screencasts (mp4 videos) are
COMSOL MULTIPHYSICS TUTORIALS HOW TO
Note that if only one input and one output port are active, the device will act as an amplitude modulator instead of a spatial switch. Transmission (y-axis) to the upper ( blue line) and lower ( green line) output waveguides versus the applied voltage (x-axis). The below plot shows that we can, indeed, switch the output port by tuning the voltage:
In other words, we need to check that the wave can be switched between two output ports by applying a voltage across the waveguide in one of the arms and then tuning it. Spatial Switchįinally, we want to confirm that we can use the device as a spatial switch if we have a scenario where all the input and output ports are connected to other fibers or waveguides. Gemetry is scaled by a factor of 80 in the y-direction. Again, we can confirm our results with an electric field norm plot.Įlectric field norm plot confirming that the power is close to equal in the two interferometer waveguide arms for a 380 micrometer long directional coupler. If we plot the results of the parameter sweep, we will see that a coupler length of 380 μm will ensure a 50/50 split of power between the arms. This can be achieved by monitoring the power difference in the two arms and sweeping the length of the coupler. Next, we have to find how long the coupler needs to be in order to give us our desired 50/50 split of incident power through the two output arms of the Mach-Zehnder interferometer. Plotting the total modal transmission over the bend radius of curvature in meters. We can also confirm our results by generating an electric field norm plot. Doing so shows us that a minimum bend radius of 2.5 millimeters gives us an acceptable 2% loss (the plot depicts a total modal transmission of 98%). To figure this out, we can plot the total modal transmission over the increasing bend radius of the curvature. In order to meet the general requirement of keeping the overall size of the device small, we need to find the smallest possible bend radius that also provides low loss. To determine the ideal design of the device, we turn to COMSOL Multiphysics and the Wave Optics Module. We need it to produce low loss, give us a 50/50 split of power through the two output arms, and be used as a spatial switch. Suppose we want to design a Mach-Zehnder modulator. In that case, we can tune the voltage so the light switches between the two output ports.Ī Mach-Zehnder modulator with an applied voltage on one of the interferometer arms. Then, the two waves combine again in a second directional coupler, and thanks to the phase difference created by the voltage, we get an amplitude modulation.Īlternatively, if the modulator’s input and output ports are all connected to other waveguides, the device can act as a spatial switch instead of an amplitude modulator. By applying a voltage across one of the two interferometer arms, we can alter the refractive index of the waveguide material and trigger a phase shift of the propagating electromagnetic wave. Its name stems from the use of a Mach-Zehnder interferometer located between two 50/50 directional couplers. The modulator controls the amplitude of an optical wave as it passes through the device.
To understand how it works and how to optimize its design, you can use the COMSOL simulation software. The Mach-Zehnder modulator is a type of optical modulator used for communication applications.
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