I am working on an internship project on photonic crystal fibres where I am using COMSOL and I have hit a bit of a roadblock. If someone wants to know the nature of the problem please look at my posts or let me know if I can dm you. I'd appreciate the help greatly
I've been using comsol for an internship project involving photonic crystal fibres and recently I noticed something peculiar. While calculating the effective mode index at a single wavelength im getting a very different answer at the same wavelength but this time when its part of a parametric sweep while every other thing is the same. These discrepancies reduce as I approach a larger wavelength. Secondly for some even shorter wavelengths I am getting the guided mode profile in a single wavelength run but that completely disappears when im running the sweep. Can someone please help out and tell me what is going on and how to fix it. Im losing my mind out here.