Hello,
I am trying to calculate the effective refractive index of a single mode inside a polymer waveguide with 4 layers (One lower cladding layer with a refractive index of 1.56, a core with 1.63, a first upper cladding layer of 1.52 and a second upper layer of 1.7). I join a picture of my waveguide.
I'm using the Optimode XS Designer software from Optiwave for my calculation.
The problem is, this software inject the lights inside the material with the higher refractive index (in my case, the second upper cladding layer), giving me wrong results because the light is not propagating through the core material which is the one where the light is supposed to go through. The parameters used for the simulation are given in an image below.
I would like to know if there is a way to force the injection inside my core material ? This way, the software would return me the good results (I hope so). Otherwise, if anyone as an idea or a formula to calculate the effective refractive index of the mode inside this type of waveguide, it would help me a lot.
Thank you very much for your reply.
Pierre-Vincent
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