[Solved] How many types of multiport optical fiber couplers are available at present?

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Q.	How many types of multiport optical fiber couplers are available at present?
A.	two
B.	one
C.	four
D.	three
Answer» D. three
Explanation: multiport optical fiber couplers are subdivided into three types. these are three and four port couplers, star couplers and wavelength division multiplexing (wdm) couplers. these couplers distribute light among the branch fibers with no scattering loss.

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