I am having trouble with the Transmission result through FDTD ports. I am testing the transmission for 2 cases. 1) Through a waveguide length of 50um. 2) Through a waveguide with a ring resonator. The goal is to see the resonance show up in the Port Transmission function. (I am not trying to find the resonance of the ring resonator. That is already done in different example.)
However, when I examine the results on the port monitor transmission, I am getting values for T greater than 1. I know that the Transmission result is normalized, so I am trying to figure out what is going wrong in order to generate gain in the monitor? There are no gain or lossy elements in my simulation space. Am I having a proximity issue of the port to the PML boundary, or something to that effect?Waveguide_port_testing450nm - Copy.fsp (5.1 MB)
I am attaching the two files I am working on for reference.