Hello dear meep users,
I am simulating an optical fiber structure having a grating layer on its tip. A
circular source is placed inside the core and transmissiom and reflection flux
is measured above and below the grating layer on the tip of fiber. In this
senario, transmission monitor layer is placed in the air just above the grating
and reflection monitir layer is placed inside the core and cladding just below
the grating layer.
The refrective indices of the structures are core: 1.468, cladding: 1.4613,
grating layer: 2.134.
If i simulate just the grating suspended in the air, the transmission and
reflection spectra are symmetric. While if i include core and cladding
transmission spectrum remains the same but reflection sprectrum show strange
graph. It ossicilates between -3 to 0.2 reflection values instead of staying in
between 0 and 1.
Can any body suggest what is the problem.
______________________
|_____________________| PML
| | air | |
|---| ---------------------- |---| Trans monitor layer
|==|== = =| = = |= = = |==| Grating layer
|---|---------|------|------- |---| Refl monitor layer
| | |core| | |
| | clad |___ | | | Source
|__|______ |___ |_____|__|
|_____________________| PML
Regards,
Yousuf
Khan
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