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Photonics

Photonics

Topics related to Lumerical and more.

How can I use the Bessel Gaussian beam source in fdtd?

    • sb2214
      Subscriber

      Lumerical only has Gaussian source, not Bessel Gaussian source. How to implement Bessel Gaussian source?

    • anna.wirth-singh
      Ansys Employee

      Hi, 

      Thanks for the question. The available built-in sources are Gaussian, plane wave, and Cauchy/Lorentzian, so you will probably have to build a custom source to do this. One approach would be to define custom spatial field profile as a Matlab dataset and import it. Or, if you have a model of your beam from Zemax, you can import it a Zemax ZBF file. Please see Import source - Simulation object – Ansys Optics for more information on importing custom sources. 

      Alternatively, if you know how to decompose your Bessel Gaussian source into plane waves, another approach would be to use a summation of plane wave sources to build up the custom source. 

      Best,

      Anna

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