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Applied Optics

Applied Optics


  • Vol. 37, Iss. 10 — Apr. 1, 1998
  • pp: 1741–1746

Distributed measurement of static strain in an optical fiber with multiple Bragg gratings at nominally equal wavelengths

Mark Froggatt and Jason Moore  »View Author Affiliations

Applied Optics, Vol. 37, Issue 10, pp. 1741-1746 (1998)

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The Fourier transform relationship between the reflected light from a Bragg grating and the complex spatial modulation of the Bragg grating is used to produce a distributed strain sensing system. A tunable external cavity diode laser along with a reference reflector in an optical fiber are used to produce a measurement of the phase and amplitude of the reflected light from the modulated Bragg grating as a function of wavelength. The system is demonstrated with 22 Bragg gratings in a single fiber on a cantilever beam and compared with foil strain gauge readings.

© 1998 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(060.2300) Fiber optics and optical communications : Fiber measurements
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.2430) Fiber optics and optical communications : Fibers, single-mode
(230.1480) Optical devices : Bragg reflectors

Original Manuscript: June 11, 1997
Revised Manuscript: November 12, 1997
Published: April 1, 1998

Mark Froggatt and Jason Moore, "Distributed measurement of static strain in an optical fiber with multiple Bragg gratings at nominally equal wavelengths," Appl. Opt. 37, 1741-1746 (1998)

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