A star coupler is a device that takes in an input
signal and splits it into several output signals.In
fiber optics, and especially in
telecommunications, a star coupler is a passive optical device, used in
network applications. An optical signal introduced into any input port is distributed to all output ports. Because of the way a passive star coupler is constructed, the number of ports is usually a power of 2; i.e., two input ports and two output ports (a "two-port" coupler, customarily called a
directional coupler, or splitter ); four input ports and four output ports (a "four-port" coupler); eight input ports and eight output ports (an "eight-port" coupler), etc.
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A passive optical coupler having a number of
input and
output ports, used in
network applications. Note: An optical
signal introduced into any input
port is distributed to all output ports. Because of the nature of the construction of a passive star coupler, the number of ports is usually a power of 2; i.e. , two input ports and two output ports (a "two-port" coupler, customarily called a "
directional coupler," or "splitter" ); four input ports and four output ports (a "four-port" coupler); eight input ports and eight output ports (an "eight-port" coupler); etc. [
FAA]
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