Abstract

A fiber-optic polarimetric strain sensor of lS=10‐cm sensing length with three-wavelength passive quadrature digital phase demodulation is investigated. The demodulation unit uses a superluminescent diode light source with narrow-band interference filters in front of the photodiodes and real-time processing of the interference intensities by an arctan-phase-stepping algorithm. Quasi-static strain sensing is performed during slow periodic compression of a composite reinforced plastic rod with a sensor glued to its surface. The measured displacement sensitivity of δΦ/δl=125 mrad/µm, with a resistive strain gauge as a reference, agrees well with the value of 119 mrad/µm previously determined by fringe-distance measurement [ Bock , Pure Appl. Opt.5, 125 (1996); ]. Despite a coherence-limited fringe contrast of only a few percent, a linearity of the phase–strain characteristic of the order of 1% and a strain resolution of 2.5 µ∊ are demonstrated.

© 2000 Optical Society of America

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  1. W. J. Bock, T. R. Wolinski, and T. A. Eftimov, Pure Appl. Opt. 5, 125 (1996).
    [CrossRef]
  2. W. J. Bock and T. A. Eftimov, Opt. Lett. 18, 1979 (1993).
    [CrossRef] [PubMed]
  3. J. J. Guerin, M. Lequime, E. Toppani, M. Leygonie, and D. Chauvel, Proc. SPIE 2361, 224 (1994).
    [CrossRef]
  4. W. J. Bock and W. Urbanczyk, in Optical Fiber Sensors, Vol. 16 of 1997 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1997), pp. 479–483.
  5. N. Fürstenau, M. Schmidt, W. Bock, and W. Urbanczyk, Appl. Opt. 37, 663 (1998).
    [CrossRef]
  6. K. Creath, in Progress in Optics XXVI, E. Wolf, ed. (Elsevier, Amsterdam, 1988), p. 364.
  7. M. Schmidt and N. Fürstenau, Opt. Lett. 24, 599 (1999).
    [CrossRef]

1999 (1)

1998 (1)

1996 (1)

W. J. Bock, T. R. Wolinski, and T. A. Eftimov, Pure Appl. Opt. 5, 125 (1996).
[CrossRef]

1994 (1)

J. J. Guerin, M. Lequime, E. Toppani, M. Leygonie, and D. Chauvel, Proc. SPIE 2361, 224 (1994).
[CrossRef]

1993 (1)

Bock, W.

Bock, W. J.

W. J. Bock, T. R. Wolinski, and T. A. Eftimov, Pure Appl. Opt. 5, 125 (1996).
[CrossRef]

W. J. Bock and T. A. Eftimov, Opt. Lett. 18, 1979 (1993).
[CrossRef] [PubMed]

W. J. Bock and W. Urbanczyk, in Optical Fiber Sensors, Vol. 16 of 1997 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1997), pp. 479–483.

Chauvel, D.

J. J. Guerin, M. Lequime, E. Toppani, M. Leygonie, and D. Chauvel, Proc. SPIE 2361, 224 (1994).
[CrossRef]

Creath, K.

K. Creath, in Progress in Optics XXVI, E. Wolf, ed. (Elsevier, Amsterdam, 1988), p. 364.

Eftimov, T. A.

W. J. Bock, T. R. Wolinski, and T. A. Eftimov, Pure Appl. Opt. 5, 125 (1996).
[CrossRef]

W. J. Bock and T. A. Eftimov, Opt. Lett. 18, 1979 (1993).
[CrossRef] [PubMed]

Fürstenau, N.

Guerin, J. J.

J. J. Guerin, M. Lequime, E. Toppani, M. Leygonie, and D. Chauvel, Proc. SPIE 2361, 224 (1994).
[CrossRef]

Lequime, M.

J. J. Guerin, M. Lequime, E. Toppani, M. Leygonie, and D. Chauvel, Proc. SPIE 2361, 224 (1994).
[CrossRef]

Leygonie, M.

J. J. Guerin, M. Lequime, E. Toppani, M. Leygonie, and D. Chauvel, Proc. SPIE 2361, 224 (1994).
[CrossRef]

Schmidt, M.

Toppani, E.

J. J. Guerin, M. Lequime, E. Toppani, M. Leygonie, and D. Chauvel, Proc. SPIE 2361, 224 (1994).
[CrossRef]

Urbanczyk, W.

N. Fürstenau, M. Schmidt, W. Bock, and W. Urbanczyk, Appl. Opt. 37, 663 (1998).
[CrossRef]

W. J. Bock and W. Urbanczyk, in Optical Fiber Sensors, Vol. 16 of 1997 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1997), pp. 479–483.

Wolinski, T. R.

W. J. Bock, T. R. Wolinski, and T. A. Eftimov, Pure Appl. Opt. 5, 125 (1996).
[CrossRef]

Appl. Opt. (1)

Opt. Lett. (2)

Proc. SPIE (1)

J. J. Guerin, M. Lequime, E. Toppani, M. Leygonie, and D. Chauvel, Proc. SPIE 2361, 224 (1994).
[CrossRef]

Pure Appl. Opt. (1)

W. J. Bock, T. R. Wolinski, and T. A. Eftimov, Pure Appl. Opt. 5, 125 (1996).
[CrossRef]

Other (2)

W. J. Bock and W. Urbanczyk, in Optical Fiber Sensors, Vol. 16 of 1997 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1997), pp. 479–483.

K. Creath, in Progress in Optics XXVI, E. Wolf, ed. (Elsevier, Amsterdam, 1988), p. 364.

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