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Problem with transmission spectrum in optical ring notch filter

Posted Feb 21, 2017, 6:00 a.m. EST Version 5.2a 0 Replies

跃德 杨
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Hi, I am trying to get the transmission spectrum of ring resonator coupled with straight waveguide system. And trying to get the relationship between the distance and coupling coefficient.

The tutorial gives a very good example on how to use beam envelope to get transmission spectrum.
They set the phase of electric field in the left part(waveguide part) and right part(ring) separately, as shown in attached picture. And use S-parameter to obtain the transmission spectrum.

However, even if I just increase the thickness of the cladding layer by 0.5um, the final results changes greatly ( I mean the transmission dip shift several nanometers and the transmission goes up to 1).
That's why I find that when I tried to use the example to obtain the transmission in other ring system, it does not work.

Does anyone could please explain the reason and told me how to get the transmission spectrum for ring resonator system? Really appreciate the help!

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0 Replies Last Post Feb 21, 2017, 6:00 a.m. EST
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Hello 跃德 杨

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