1 February 1992 Simultaneous single-fiber communications and linear position sensing
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Although the concept of using a single optical fiber for simultaneous sensing and communications is not new, surprisingly little experimental work has been reported. Initial studies combining a single analog tone frequency and modal domain vibration sensing were first reported only within the past few years. We describe an extension of that work that includes the demonstration of simultaneous high data rate digital optical communications and linear displacement sensing on a single multimode optical fiber. The data transmission consisted of digital pseudorandom bit sequences at various standard telecommunication speeds. Measurement of variations in the data stream bit error rate allowed determination of the position of a simple in-line fiber optic displacement sensor. Experimental results and system configurations are given for both static and dynamic displacements. Finally, the use of communication ranging techniques to determine in-line sensor location is described.
Peter L. Fuhr, Peter L. Fuhr, Peter J. Kajenski, Peter J. Kajenski, Dryver R. Huston, Dryver R. Huston, William B. Spillman, William B. Spillman, } "Simultaneous single-fiber communications and linear position sensing," Optical Engineering 31(2), (1 February 1992). https://doi.org/10.1117/12.56062 . Submission:

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