## Understanding Classical Gray Body Radiation Theory

##### Yosuke Mizuyama November 1, 2018

Imagine how efficient an incandescent lamp with an infrared suppressing black body filament would be. Alas, classical gray body radiation theory tell us this “dream lamp” is an impossibility…

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### The Nonparaxial Gaussian Beam Formula for Simulating Wave Optics

##### Yosuke Mizuyama June 26, 2018

Here’s your introduction to the nonparaxial gaussian beam formula, which is used for simulating wave optics problems in COMSOL Multiphysics®.

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### How to Use the Beam Envelopes Method for Wave Optics Simulations

##### Yosuke Mizuyama January 8, 2018

In order to simulate optically large optical systems, you need to solve for Maxwell’s equations, which requires a fine mesh and a lot of computational energy. Enter the beam envelope method.

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### How to Analyze Laser Cavity Stability with Multiphysics Ray Tracing

##### Yosuke Mizuyama June 15, 2017

If you’re looking for an in-depth example of multiphysics ray tracing, then check out this blog post about analyzing and predicting laser cavity stability in the COMSOL® software.

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### How Does the Choice of Ray Tracing Algorithm Affect the Solution?

##### Yosuke Mizuyama June 13, 2017

When performing a high-frequency optics simulation, do you use a sequential, nonsequential, or exact ray tracing algorithm? Learn how to choose to make the most of your solution.

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### How to Implement the Fourier Transformation from Computed Solutions

##### Yosuke Mizuyama February 27, 2017

In this wave optics demonstration, learn how to implement the Fourier transformation for computed solutions, using the example of an electromagnetic simulation of a Fresnel lens.

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### Understanding the Paraxial Gaussian Beam Formula

##### Yosuke Mizuyama September 21, 2016

The Gaussian beam is recognized as one of the most useful light sources. To describe the Gaussian beam, there is a mathematical formula called the paraxial Gaussian beam formula. Today, we’ll learn about this formula, including its limitations, by using the Electromagnetic Waves, Frequency Domain interface in the COMSOL Multiphysics® software. We’ll also provide further detail into a potential cause of error when utilizing this formula. In a later blog post, we’ll provide solutions to the limitations discussed here.

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### How to Implement the Fourier Transformation in COMSOL Multiphysics

##### Yosuke Mizuyama May 30, 2016

In a previous blog post, we discussed simulating focused laser beams for holographic data storage. In a more specific example, an electromagnetic wave focused by a Fourier lens is given by Fourier transforming the electromagnetic field amplitude at the lens entrance. Let’s see how to perform this integral type of preprocessing and postprocessing in COMSOL Multiphysics with a Fraunhofer diffraction example.

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### How to Simulate a Holographic Page Data Storage System

##### Yosuke Mizuyama April 14, 2016

We’ve learned how to simulate a simple bit-by-bit holographic data storage model in COMSOL Multiphysics by choosing an appropriate beam size and implementing the recording and retrieval process. Today, we step forward and demonstrate how to simulate a more difficult and complex, yet more realistic and interesting model of a holographic page data storage system.

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### Simulating Holographic Data Storage in COMSOL Multiphysics

##### Yosuke Mizuyama April 5, 2016

Physicist and electrical engineer Dennis Gabor invented holography about 70 years ago. Ever since then, the form of optical technology has developed in many different ways. In this blog post, part one in a series, we talk about a specific industrial application of holograms in consumer electronics and demonstrate how to use COMSOL Multiphysics to simulate holograms in a wide spectrum of optical and numerical techniques.

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### Simulation Improves Range of Motion in Piezoelectric Actuators

##### Yosuke Mizuyama February 15, 2016

Piezoelectricity finds use in a variety of engineering applications. They include transducers, inkjet printheads, adaptive optics, switching devices, cellphone components, and guitar pickups, to name a few. Today’s blog post will benefit both beginners and experts in piezoelectricity, as we highlight some of the fundamental elements of piezoelectric theory and basic simulations, along with a novel design for improving the range of motion for piezoelectric actuators.

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