Unidirectional star coupler for single-fiber distribution systems.
The design and construction of a unidirectional star coupler for single-fiber distribution systems are described. A rectangular mixing section is required to obtain uniform output distribution. Four-port stars have been constructed with losses only (1/2) to 1 dB greater than packing fraction. For any given input, outputs are uniform to within about +/-1 dB.
Hocker
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Honeywell Corporate Material Sciences Center, 10701 Lyndale Avenue South, Bloomington, Minnesota 55420, USA.