Reply To: Designing a single mode fiber

[Guilin Sun]

You can either based on existing example or from scratch. YOu can use a cylinder as the core and a ring as the clading, or even two cylinders (circle). Since Lumerical uses mesh override the geometry https://optics.ansys.com/hc/en-us/articles/360034915233-Understanding-mesh-order-for-overlapping-objects you may first create the cladding, and change the core radius.

Other than TE mode, do you have other requirements?  I believe crearing a fiber to have TE mode is easy. But with other requirements you may need to spend time to optimize, or parameter sweep.

https://optics.ansys.com/hc/en-us/articles/360042798673-SMF-28-fiber-mode-calculation

https://optics.ansys.com/hc/en-us/articles/360034901513-Circle-Simulation-Object

https://optics.ansys.com/hc/en-us/articles/360034382194-Ring-Simulation-Object

https://optics.ansys.com/hc/en-us/articles/360034922873-Parameter-sweep-utility