June 24, 2020 at 7:48 am
#67420
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Hello Mohamed,
You need to add an optical delay component at the output of the fiber port, which is connected to the input port of the coupler. Usually, you need to do that whenever you use the same signal in the backward direction. Don’t forget to change the index to 1 from 0 in the visualizers used to view the signals after the delay elements.
Regards,
Ahmad
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