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Optics Letters

Optics Letters


  • Vol. 18, Iss. 22 — Nov. 15, 1993
  • pp: 1973–1975

In-line fiber étalon for strain measurement

J. S. Sirkis, D. D. Brennan, M. A. Putman, T. A. Berkoff, A. D. Kersey, and E. J. Friebele  »View Author Affiliations

Optics Letters, Vol. 18, Issue 22, pp. 1973-1975 (1993)

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A description and demonstration of a fiber interferometer that uses a short segment of silica hollow-core fiber spliced between two sections of single-mode fiber to form a mechanically robust in-line cavity are presented. The hollow-core fiber is specifically manufactured to have an outer diameter that is equal to the outer diameter of the single-mode lead fibers, thereby combining the best qualities of existing intrinsic and extrinsic Fabry–Perot sensors. A dynamic strain resolution of 22 n / Hz at frequencies of >5 Hz with a sensor gauge length of 137 μm is demonstrated.

© 1993 Optical Society of America

Original Manuscript: June 7, 1993
Published: November 15, 1993

M. A. Putman, T. A. Berkoff, A. D. Kersey, J. S. Sirkis, D. D. Brennan, and E. J. Friebele, "In-line fiber étalon for strain measurement," Opt. Lett. 18, 1973-1975 (1993)

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