Lumerical Forum <2026>

: Always state the exact software version (e.g., Ansys Lumerical 2024 R2) and solver you are using.

Tell me and the specific roadblock you are facing!

The Lumerical Forum, previously known as the , is the primary hub for photonics researchers and engineers seeking technical support for Lumerical's simulation tools. Since April 2021, the community has migrated to the Ansys Learning Forum (ALF) following Ansys's acquisition of Lumerical. Key Platform Transition

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Simulating multiphysics effects in optoelectronic devices. lumerical forum

This error usually indicates that the autoshutoff level is not being triggered correctly, likely due to a localized resonance or a meshing issue near the curved structure.

for the Lumerical Script File (.lsf) environment

: Support registration is not required to browse the ALF, making it more accessible for prospective users and students.

State clearly what device you are simulating, what physics you are testing (e.g., thermal, electrical, optical), and what your expected outcome is compared to your current result. 2. Specify Software and Version : Always state the exact software version (e

Clearly state the optical phenomenon you are trying to capture (e.g., plasmonic resonance, far-field scattering, waveguide dispersion).

As GPUs become increasingly central to simulation workflows, the forum has seen discussions comparing CPU and GPU performance. A thread from January 2026 examined potential meshing differences between GPU and CPU simulations. While the grating coupler example showed identical grid points across both, users reported inconsistent behaviors that seemed to depend on machine history and Python-generated project file states.

Ensure the source and monitors span far enough past the PML fields, and use the "Total-Field Scattered-Field" (TFSF) source appropriately for scattering objects.

The Ultimate Guide to the Ansys Lumerical Forum: A Hub for Photonics Innovation Since April 2021, the community has migrated to

I have set up a 2D simulation of a ring resonator. I defined the silicon core with a mesh override region to resolve the 1550nm wavelength properly. However, after roughly 20% of the simulation time, the job manager reports: "WARNING: Electric field values are too large... simulation diverging."

Use the search bar to look for error codes or specific simulation techniques before posting a new question.

: It contains a massive repository of "Application Gallery" examples where users share .fsp (FDTD) or .ldev (DEVICE) files for everything from CMOS image sensors to grating couplers. [1]

Does anyone have suggestions on how to stabilize this simulation? Any advice would be appreciated.