Hi Farhad, As its name implies, the pump coupler bidirectional is bidirectional and you can see this from the inputs and outputs of the component. On the other hand, the pump-coupler co-propagating is not bidirectional, and you can determine the attenuation of the signal and the pump. i suggest that you take a look at the help section for both components more more detailed information.
Dear Farhad, In the first two outputs, the signal from the input 3 is there considering the insertion loss for each input. In addition, the signal from input port of each of these outputs (outpus 1 and 2) can also exist in their output depending on their return loss. So the signal from Input 3 is splitted between output 1 and output 2.
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