I want to get familiar with the elements in the INTERCONNECT library, and I built a MZ interferometer. But there are some problems confused me.
In one arm of the MZ interferometer, I added a phase shifter (phase angle=0rad) and a polarization rotator (angle=pi/2) which change the TE mode into TM mode. For convenience, I wrote the OOSC results in the figure. I found that there is no TM mode at the output.
To my knowledge, the TE mode and TM mode cannot interfere so the intensity (or optical power) should be the sum of the two modes. There should be 2.5W TE mode and 2.5W TM mode at each output ports. But the simulation shows no TM mode. Please help me find my wrong settings!
I have tried to disconnect one line, as shown below, and the TM mode appears!!!
Thank you very much!