[Alvin HuiParticipant]

Thanks Damian!! Could you define more how is “the bends are not very sharp”. I would like to determine the bending with curvature radius down to 1 micrometer. The cases of bending includes 90 degrees, 180 degrees (i.e. like a u-turn) and 360 degrees (i.e. a closed ring). Will it be possible to use OptiBPM to simulate the bending losses of the abovementioned cases?

[Alvin HuiParticipant]

Thanks Steve! After I reduced the mesh size, the ADI mode solver returned one mode. However, the mode is a bit different from the mode found by the FD method.

Modes Modal Index Polarization
Mode 1 2.31022444, -0.00336495 FVect TE (by ADI method)
Mode 1 2.34768099, 0.0 FVect TE (by FD method)

The project is attached. Thanks for your help!