Abstract
The advent of multimode fiber-optic sensors in industrial instrumentation1 calls for multichannel scanners or multiplexers when a large number of sensors is involved. Most low-loss multichannel scanner designs suggested in the literature are electromechanical devices based on rotary2 or translational3 motion. A complication is the high demands on reliability and long life in combination with small dimensions and tolerances. Furthermore, often a large number of sensors should be addressable, excluding the possibility of cascading simple bypass switches due to the inherently high loss caused by serial coupling.
© 1985 Optical Society of America
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