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Applied Optics

Applied Optics


  • Vol. 39, Iss. 7 — Mar. 1, 2000
  • pp: 1106–1111

Fiber Bragg grating strain sensor demodulation with quadrature sampling of a Mach–Zehnder interferometer

Minho Song, Shizhuo Yin, and Paul B. Ruffin  »View Author Affiliations

Applied Optics, Vol. 39, Issue 7, pp. 1106-1111 (2000)

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A simple and highly sensitive phase-demodulation technique is proposed, and its use for a fiber Bragg grating strain sensor is experimentally demonstrated. Sampling a phase-modulated Mach–Zehnder output with controlled time delay produced two quadrature data streams that have relative quadrature phase difference (90°). The Bragg wavelength-dependent phase information is extracted by application of digital arctangent function and phase unwrapping to the quadrature signals. By use of this technique with a reference grating, strain sensing at as much as a 30-kHz sampling rate was obtained with strain resolution of 3.5 microstrains and 6 nanostrains/ Hzin quasi-static and dynamic strain measurements, respectively.

© 2000 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.5060) Instrumentation, measurement, and metrology : Phase modulation

Original Manuscript: June 24, 1999
Revised Manuscript: November 29, 1999
Published: March 1, 2000

Minho Song, Shizhuo Yin, and Paul B. Ruffin, "Fiber Bragg grating strain sensor demodulation with quadrature sampling of a Mach–Zehnder interferometer," Appl. Opt. 39, 1106-1111 (2000)

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  1. A. Dandridge, A. B. Tveten, T. G. Giallorenzi, “Homodyne demodulation scheme for fiber optic sensors using phase generated carrier,” IEEE J. Quantum Electron. JQE-18, 1647–1653 (1982). [CrossRef]
  2. Y. L. Lo, J. S. Sirkis, C. C. Chang, “Passive signal processing of in-line fiber etalon sensors for high strain-rate loading,” J. Lightwave Technol. 15, 1578–1585 (1997). [CrossRef]
  3. M. Kobayashi, K. Takada, J. Noda, “Optical-frequency encoder using polarization-maintaining fiber,” J. Lightwave Technol. 8, 1697–1701 (1990). [CrossRef]
  4. K. Takada, “High-resolution OFDR with incorporated fiber-optic frequency encoder,” IEEE Photon. Technol. Lett. 4, 1069–1072 (1992). [CrossRef]
  5. K. P. Koo, A. B. Tveten, A. Dandridge, “Passive stabilization scheme for fiber interferometers using (3 × 3) fiber directional couplers,” Appl. Phys. Lett. 41, 616–618 (1982). [CrossRef]
  6. D. W. Stowe, T. Y. Hsu, “Demodulation of interferometric sensors using a fiber-optic passive quadrature demodulator,” J. Lightwave Technol. 1, 519–523 (1983). [CrossRef]
  7. Y. L. Lo, “In-fiber Bragg grating sensors using interferometric interrogations for passive quadrature signal processing,” IEEE Photon. Technol. Lett. 10, 1003–1005 (1998). [CrossRef]
  8. M. Schmidt, N. Furstenau, “Fiber-optic extrinsic Fabry–Perot interferometer sensors with three-wavelength digital phase demodulation,” Opt. Lett. 24, 599–601 (1999). [CrossRef]
  9. A. D. Kersey, M. A. Davis, H. J. Patrick, M. LeBlanc, K. P. Koo, C. G. Askins, M. A. Putnam, E. J. Friebele, “Fiber grating sensors,” J. Lightwave Technol. 15, 1442–1462 (1997). [CrossRef]
  10. B. V. Dorrio, J. L. Fernandez, “Phase-evaluation methods in whole-field optical measurement techniques,” Meas. Sci. Technol. 10, R33–R55 (1999). [CrossRef]
  11. R. S. Weis, A. D. Kersey, T. A. Berkoff, “A four-element fiber grating sensor array with phase-sensitive detection,” IEEE Photon. Technol. Lett. 6, 1469–1471 (1994). [CrossRef]
  12. A. D. Kersey, T. A. Berkoff, W. W. Morey, “Fiber-optic Bragg grating strain sensor with drift-compensated high-resolution interferometric wavelength-shift detection,” Opt. Lett. 18, 72–74 (1993). [CrossRef] [PubMed]

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