Hi Lim jorn
If you wish to understand the theory behind any component in optiwave u can know that by the component help optiwave has provided.
One point i would like to add about the power splitter is that it is used to split the power.Many a times when we use it in PON networks we get confused about its use as a bit rate splitter which is not the case.It is used to split the power equally to all the optical network units.
Thanks and regards