Two-axis bend measurement with Bragg gratings in multicore optical fiber

Flockhart, G M H and MacPherson, W N and Barton, J S and Jones, J D C and Zhang, L and Bennion, I (2003) Two-axis bend measurement with Bragg gratings in multicore optical fiber. Optics Letters, 28 (6). pp. 387-389. ISSN 0146-9592

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    Abstract

    We describe what is to our knowledge the first use of fiber Bragg gratings written into three separate cores of a multicore fiber for two-axis curvature measurement. The gratings act as independent, but isothermal, fiber strain gauges for which local curvature determines the difference in strain between cores, permitting temperature-independent bend measurement. (C) 2003 Optical Society of America.