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Understanding Stimulated Brillouin Scattering with a Multiphysics Approach in COMSOL®


If you are interested in learning how to model stimulated Brillouin scattering (SBS) in COMSOL Multiphysics®, then tune into this webinar with guest speaker Carl Meinhart of Numerical Design, Inc. and the University of California, Santa Barbara.

SBS is commonly observed in long lengths of optical fiber, where the electromagnetic intensity exceeds a critical level and there is sufficient distance for the SBS to accumulate. There has been renewed interest in SBS, as it is now feasible to microfabricate photonic chips that exhibit SBS.

In this webinar, we present a multiphysics approach for simulating SBS in the COMSOL® software. First, optical whispering gallery modes are predicted. Next, they are combined with the photoelastic tensor to estimate the 3D electrostrictive stress distribution, which is used to simulate 11-GHz acoustical phonons. Finally, the SBS gain is calculated by integrating the overlap modes between the pump photons and acoustic phonons. The results are compared to experimental data (Hansuek et al., 2012), which reports Q factors approaching 875 million.

This webinar includes a live demo and Q&A session.

Numerical simulation of an optical ring resonator.



Carl Meinhart, University of California – Santa Barbara (UCSB)/ Numerical Design, Inc.

Dr. Carl Meinhart is a professor of mechanical engineering at the University of California – Santa Barbara (UCSB). He obtained his PhD from the University of Illinois in 1994. Since coming to UCSB in 1996, his research has focused on developing microfluidic devices and investigating their fundamental transport mechanisms. Professor Meinhart’s research on microfluidics has been cited approximately 7800 times, with an h-index of 34 (Google Scholar™ scholarly texts search). He has seven issued patents. In addition to being a professor at UCSB, Dr. Meinhart is the founder and CEO of Numerical Design, Inc., which is a COMSOL Certified Consultant. Dr. Meinhart is a fellow of the American Physical Society.


Mads J. Herring Jensen, Technical Product Manager, COMSOL

Mads Herring Jensen is a technical product manager for acoustics who joined COMSOL in 2011. Before starting at COMSOL, he worked in the hearing aid industry for five years as an acoustic finite element expert. Mads has a PhD in computational fluid dynamics from the Technical University of Denmark.


Dexter Johnson is the author of IEEE Spectrum’s online blog The Nanoclast. He has researched and written reports and analysis in the areas of nanotechnology, sensors, IT, advanced manufacturing and economic trends within a number of different industries. He has been the program director for international conferences in the areas of telecommunications, digital content delivery and nanotechnology. In addition to his work at IEEE Spectrum, Dexter is a senior analyst with Cientifica, a UK-based business intelligence company for emerging technologies.

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