Learning Forum

[Duru Deniz Arda]

Hi,

I am working on a straight wg with gaps and I am confused about the losses and the results I viewed with using Interconnect. If I look at the losses from ports, they are always zero. However; using Interconnect I never get 0 loss. With regard to the zero loss on ports, I wonder what is this loss in Interconnect and why they are not same with results from the ports. Also when I have more than 2 ports ( one of course for input) how can I view the losses difference between the ports and the total loss? And can be viewed this totall loss from the last port that I used as an output ? the totall loss is for every kind of loss ?  ( I mean if I do consider a bend waveguide, do i see all 3 kinds of losses like propogation, conversion and radiation losses ?) 

Thanks in adnvance

Deniz

[Niki Papachristou]

Hi Duru,

Thank you for reaching out to us! May I confirm with you that the case of zero losses that you are discribing, is when simulating your waveguide in MODE?

Kind Regards,

Niki

[Duru Deniz Arda]

no actually in FDTD and I click right on the one of the ports which I place on wg and select "user select". Then I click select modes. Here it is zero; however, in Interconnect loss is never 0.

[Niki Papachristou]

Hi Duru,

Thank you for your screenshot, this was actually very helpful. I think you are using the FDE solver built in FDTD and the reason that you are not seeing losses in this case is because you are calculating a cross section of your waveguide, while in Interconnect you are measuring the losses of your whole waveguide. Now, for your additional questions, allow me a couple of days to work on them and I will come back.

[Duru Deniz Arda]

Hi,

Than can I say the loss from port 1 is the whole loss until coming this port on the wg. If I look at the difference lets say between port 2 and port 3, that would be the loss difference bewteen these two points ? I confused now because I thought the biggest loss comes from the last port kind of the output port on wg but the biggest loss I have viewed is from the very first input port. 

Thanks

[Niki Papachristou]

Hi Duru,

Thank you for your reaply! I am a little bit confused on the way you are trying to descibe the losses here. Can you please send me a screenshot of your interconnect diagram instead?

Kind Regards,

Niki

[Duru Deniz Arda]

Hi,

The losses look like this in this photo.