Learning Forum

[Love]

Hello Lumerical Team,

I'm trying to configure a directional coupler with 70% of its power going to the PIN diode and 30% of power remaining in the loop. Is it possible to do that using s-parameters? Or there's a simpler way to do it? Thank you!

[GWANG]

Hi Love
You can use s-parameter to do this, and I think a directional coupler could also do the job, you just need to set the power split ratio to 7:3. The element is "Waveguide coupler".

[Love]

Hi GWANG, thank you for your help. I used a waveguide coupler but I didn't find the setting for the power split ratio. Do you know where can I find it? Thank you!

[GWANG]

Hi Love
It's the coupling coefficient. The coupling coefficient is the field coupling ratio, so you will need to cacluate for the corresponding power spliting ratio to field spliting ratio.