Tunable optical fiber vibration mode sensor using two-mode fiber

Jonathan A. Greene; Kent A. Murphy; Sridhar Rudraraju; Anbo Wang; Richard O. Claus

doi:10.1117/12.165914

30 December 1993 Tunable optical fiber vibration mode sensor using two-mode fiber

Jonathan A. Greene, Kent A. Murphy, Sridhar Rudraraju, Anbo Wang, Richard O. Claus

Proceedings Volume 2071, Distributed and Multiplexed Fiber Optic Sensors III; (1993) https://doi.org/10.1117/12.165914
Event: Optical Tools for Manufacturing and Advanced Automation, 1993, Boston, MA, United States

Abstract

Techniques are being investigated to spatially weight the strain sensitivity of a two-mode fiber strain sensor by mechanically altering the shape of the fiber along its length. The goal of this process is to obtain fibers that will be single-mode (V < 2.4) over a well-defined sensing length and dual-mode (2.4 < V < 3.8) over the remaining section of fiber. The single- mode section will be relatively insensitive to applied strain, while the dual-mode section will detect a distributed strain field associated with structural vibration mode shapes. The integrated strain will be over the two-mode section of the fiber, which will change with the changing wavelength of the interrogation beam.

Citation Download Citation

Jonathan A. Greene, Kent A. Murphy, Sridhar Rudraraju, Anbo Wang, and Richard O. Claus "Tunable optical fiber vibration mode sensor using two-mode fiber", Proc. SPIE 2071, Distributed and Multiplexed Fiber Optic Sensors III, (30 December 1993); https://doi.org/10.1117/12.165914

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