Hi Hoat,
As We know optical buffer is a device that is capable of temporarily storing light. Just as in the case of a regular buffer, it is a storage medium that enables compensation for a difference in time of occurrence of events. More specifically, an optical buffer serves to store data that was transmitted optically (i.e., in the form of light), without converting it to the electrical domain.
But, The Buffer Selector is used to select the signal data associated with a specified iteration in a series of iterations.
We could change the iteration , The parameter Selection is set by default to 0 (the indexing for iterations starts at 0). If the parameter Selection is set to Iterations – 1 (using Script mode) the component will forward the signal data associated with the final iteration of the series. For example (see Figure) if Iterations = 5 (within Layout Parameters/Signals), the Buffer Selector will forward the signal data associated with the 5th iteration of the CW laser.
Thanks,