Fiber optic couplers are optical devices that connect three or more fiber ends ... Passive couplers either use micro-lenses, graded-refractive-index (GRIN) rods and beam splitters, optical mixers, or ...
PLC (planar lightwave circuit) splitters regulate the power of optical signals ... resources such as fiber and steel. The low cost of the constituents makes the components relatively inexpensive.
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