Learning Forum

[iqnlo]

Hi guys

I'm modelling a fibre-chip coupling process. However, I only have the mode field diameter and NA of the fibre but no refractive index of core or cladding is provided. Is there a good way to represent this kind of fibre? I am thinking of input a Gaussian beam with the correct diameter. However, I found the gaussian source input is only available in the FDTD solver and I want to model the chip in EME solver as the chip length is several hundred um long.

May I ask for some suggestions? Many thanks in advance!

[Guilin Sun]

For EME, you can import the source at port
Please note that your result can only be as good as your model, including the source.

[iqnlo]

Thank you so much for your reply.
When I click the user import button, a window pop up and ask me to upload something. May I know where shall I download the field file? Thank you!

[Guilin Sun]

Because you want to import Gaussian source, you should have your own data. you can also use script to generate the beam.

[iqnlo]

[iqnlo]

May you attach a link here to show how to generate the file? I didn't find any information about doing this. Thank you so much!

[Guilin Sun]

Please check videos and applications
Optical Sources - Import Source - Physics & Applications
Optical Sources - Import Source - Setup & Tips
Importing arbitrary source fields into EME ports
Using an equation to define the spatial field profile of a source in FDTD It has the scalar Guassian beam. You can also use NA beam source in FDTD, with a monitor one cell away to get the data, and import it: Using monitor data to define the spatial field profile of a source in FDTD