SMF 3D Analysis

Please login with a confirmed email address before reporting spam

Hi all, hope you are doing fine.

I am trying to run a 3D simulation and analysis using COMSOL 6.3 version, for a SMF. My geometry simulates a real fiber with 10 um core radius and 125 um cladding radius. The idea was to simply see propagation through a short lenght on lam=1550 nm.

On my setup I am using the Wave Optics module > Eletromagnetic Waves > Beam Envelopes, with a Boundary Mode Analysis for both input and output ports, plus a Frequency Domain study.

Inicially, tried to replicate tutorials seen on youtube (https://www.youtube.com/watch?v=kBQCvzn_dxc), that were using COMSOL 5.6. Most of the GUI is the same throughout menus, except for Mode Solver option within Boundary Mode Analysis > Study Settings.

In my setup, I used the ARPACK, but do not know the difference to the "Normal" used on version 5.6. All other parameters are the same.

For my surprise, the propagation seen in my study was quite different from the original, and not commonly seen on theory. The electric field is pulsing during propagation length, with little concentration on the core and significant in the interface between core and clad.

If someone could please help me understand what I am doing wrong, I would appreciate. I´ve ran 2D simulations in the past, but I´m rookie on 3D.

Thanks!



Reply

Please read the discussion forum rules before posting.

Please log in to post a reply.

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.