10 April 2007 High-accuracy fiber-optic shape sensing
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Abstract
We describe the results of a study of the performance characteristics of a monolithic fiber-optic shape sensor array. Distributed strain measurements in a multi-core optical fiber interrogated with the optical frequency domain reflectometry technique are used to deduce the shape of the optical fiber; referencing to a coordinate system yields position information. Two sensing techniques are discussed herein: the first employing fiber Bragg gratings and the second employing the intrinsic Rayleigh backscatter of the optical fiber. We have measured shape and position under a variety of circumstances and report the accuracy and precision of these measurements. A discussion of error sources is included.
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Roger G. Duncan, Mark E. Froggatt, Stephen T. Kreger, Ryan J. Seeley, Dawn K. Gifford, Alexander K. Sang, Matthew S. Wolfe, "High-accuracy fiber-optic shape sensing", Proc. SPIE 6530, Sensor Systems and Networks: Phenomena, Technology, and Applications for NDE and Health Monitoring 2007, 65301S (10 April 2007); doi: 10.1117/12.720914; https://doi.org/10.1117/12.720914
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