OTDR- backscattered light not detected by apd
Hello everybody. I have problem with simulating OTDR in optisystem. I am very new at this and have been trying for a while to achieve any results, but it seems to still not be working correctly. The APD photodetector doesn’t detect the backscattered light from the fiber, as I am performing the simulations I can see that Optical Spectrum Analyzer does see some backscattered light, but the optical time domain visualizer doesn’t give any results. I am really confused and don’t know what is wrong with my project, please help me. Thank you in advance.
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