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Fiber optic couplers can be either active or passive devices. The difference between active and passive couplers is that a passive coupler redistributes the optical signal without optical-to-electrical conversion. Active couplers are electronic devices that split or combine the signal electrically and use fiber optic detectors and sources for input and output.

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Active optical components require power to operate and perform functions such as amplification, modulation, or conversion of optical signals. Passive optical components, on the other hand, do not require power and perform basic functions such as splitting, combining, or routing optical signals without any signal manipulation.

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Q: Difference between active and passive optical component?
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