I want to simulate a FBG based Fabry-Perot cavity in the Optisystem. As a starting point, I am using bidirectional reflectors and a CW laser. When I sweep the laser frequency, I do not see classical transmission peaks. I have calculated Finesse and FSR and I believe that my sweeping range (1549.9-1550.1nm) and step size (1000) are correct to see transmission peaks. Any help would be highly appreciated. See the attached model (with less steps to reduce the size).
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