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What is a fiber optic coupler?
A fiber optic coupler is an optical device capable of connecting one or more fiber ends in order to allow the transmission of light waves in multiple paths. The device is capable of combining two or more inputs into a single output and also dividing a single input into two or more outputs. Compared to a splice or connector, the signal can be more attenuated by fiber optic couplers, as the input signal can be divided amongst the output ports.
Couplers can be fabricated in different ways, for example by thermally fusing fibers so that their cores get into intimate contact
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