A concentrator usually provides communication capability between many low-speed, usually asynchronous channels and one or more high-speed, usually synchronous channels. Usually different speeds, codes, and protocols can be accommodated on the low-speed side. Fibre Channel is seen as an ideal medium to connect storage devices and to do local networking. But a physical loop will be difficult to construct as it requires individual cables or special. The Active Concentrator is a fiber optic distribution unit used in IEEE 802. In this Letter, consideration of the processes in a fluorescent concentrator leads to a simple design strategy for these concentrators for this. A single input to multiple output optical concentrator is presented that can split a millimeter-scale input area into multiple sections and concentrate each section into a separate output. The outputs are designed to have a high coupling efficiency into a multimode fiber array or high-speed.
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