They are used to divide a beam of light into two or more separate beams. Conversely, it can also combine multiple signals into one. Its primary role is in Passive Optical Networks (PON), which are the foundation of. Beam splitters are optical devices that play a crucial role in various scientific and industrial applications. Depending on the design, beam splitters can either reflect a portion of the incoming light and transmit the. These exiting beams are differentiated by either their optical power (non-polarizing), polarization states (polarizing), or wavelength (dichroic). Non-polarizing beamsplitters are specified by their splitting ratio, i.