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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 18, Iss. 5 — Mar. 1, 1979
  • pp: 666–670

Optical fiber acoustic sensor utilizing mode-mode interference

M. R. Layton and J. A. Bucaro  »View Author Affiliations


Applied Optics, Vol. 18, Issue 5, pp. 666-670 (1979)
http://dx.doi.org/10.1364/AO.18.000666


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Abstract

A method for detecting sound using a single step-index multimode fiber is presented. The detected signal results from differences in acoustically induced phase shifts between two different waveguide modes propagating in the fiber. The relative sensitivity of this technique compared with a two-path interferometer was experimentally determined and agreed with that calculated using the fiber parameters. Because the sensitivity of this approach is proportional to the difference in propagation constants for modes in the fiber, it is approximately 10−3 less sensitive than the single-mode interferometer arrangement.

© 1979 Optical Society of America

History
Original Manuscript: March 1, 1978
Published: March 1, 1979

Citation
M. R. Layton and J. A. Bucaro, "Optical fiber acoustic sensor utilizing mode-mode interference," Appl. Opt. 18, 666-670 (1979)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-18-5-666

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