Power over fiber

Power over fiber optics

(from Texas Instruments Wiki:)

“Such an arrangement is convenient when (a) you don’t want to run “live” copper power lines to the MCU (such as when the MCU is part of a fuel gage inside an aircraft fuel tank), and (b) The MCU is difficult to access, so periodically replacing batteries is annoying (such as when the MCU is part of a fuel gage inside an aircraft fuel tank).”

It does also add to survivability and weight reduction, the first because a number of fibers can be paralleled with different paths to the same end and to redundant actuators, the second because optical devices are as resistant to EM as pneumatic, mechanical and hydraulic, “but” weight “way less” adding to efficiency and favorable TWR, without counting also the further advantages of in-band signaling and redundancy, that can be designed/multiplexed into such systems.

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