Abstract

A new technique for distributed fiber-optic sensing is described. It is a wavelength-scanning method that uses, as a sensing element, a polarization-maintaining fiber illuminated with a white-light source. The distribution of the mode-coupling coefficient is determined by a new digital procedure with a fast-Fourier-transform algorithm. Experimental results demonstrate that, when birefringence dispersion is taken into account, more than 300 elements can be resolved along the fiber.

© 1993 Optical Society of America

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References

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  1. A. J. Rogers, Phys. Rep. 169, 99 (1988).
    [CrossRef]
  2. A. D. Kersey, Proc. Soc. Photo-Opt. Instrum. Eng. 1367, 2 (1990).
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    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
  5. W. P. Risk, R. C. Youngquist, G. S. Kino, H. J. Shaw, Opt. Lett. 9, 309 (1984).
    [CrossRef] [PubMed]
  6. J. Noda, T. Hosaka, Y. Sasaki, Electron. Lett. 20, 906 (1984).
    [CrossRef]
  7. S. Chen, I. P. Giles, M. Fahadiroushan, Opt. Lett. 16, 342 (1991).
    [CrossRef] [PubMed]
  8. L. Fei, Y. Muolin, H. Shanlian, Proc. Soc. Photo-Opt. Instrum. Eng. 1367, 221 (1990).
  9. K. Kurosawa, S. Hattori, T. Yoshino, Proc. Soc. Photo-Opt. Instrum. Eng. 798, 36 (1987).

1991 (1)

1990 (2)

A. D. Kersey, Proc. Soc. Photo-Opt. Instrum. Eng. 1367, 2 (1990).

L. Fei, Y. Muolin, H. Shanlian, Proc. Soc. Photo-Opt. Instrum. Eng. 1367, 221 (1990).

1988 (2)

1987 (1)

K. Kurosawa, S. Hattori, T. Yoshino, Proc. Soc. Photo-Opt. Instrum. Eng. 798, 36 (1987).

1984 (2)

1979 (1)

Chen, S.

Fahadiroushan, M.

Fei, L.

L. Fei, Y. Muolin, H. Shanlian, Proc. Soc. Photo-Opt. Instrum. Eng. 1367, 221 (1990).

Giles, I. P.

Hattori, S.

K. Kurosawa, S. Hattori, T. Yoshino, Proc. Soc. Photo-Opt. Instrum. Eng. 798, 36 (1987).

Higashi, T.

Hosaka, T.

J. Noda, T. Hosaka, Y. Sasaki, Electron. Lett. 20, 906 (1984).
[CrossRef]

Kersey, A. D.

A. D. Kersey, Proc. Soc. Photo-Opt. Instrum. Eng. 1367, 2 (1990).

Kino, G. S.

Kurosawa, K.

K. Kurosawa, S. Hattori, T. Yoshino, Proc. Soc. Photo-Opt. Instrum. Eng. 798, 36 (1987).

Muolin, Y.

L. Fei, Y. Muolin, H. Shanlian, Proc. Soc. Photo-Opt. Instrum. Eng. 1367, 221 (1990).

Negishi, Y.

Noda, J.

J. Noda, T. Hosaka, Y. Sasaki, Electron. Lett. 20, 906 (1984).
[CrossRef]

Risk, W. P.

Rogers, A. J.

A. J. Rogers, Phys. Rep. 169, 99 (1988).
[CrossRef]

Sasaki, Y.

J. Noda, T. Hosaka, Y. Sasaki, Electron. Lett. 20, 906 (1984).
[CrossRef]

Shanlian, H.

L. Fei, Y. Muolin, H. Shanlian, Proc. Soc. Photo-Opt. Instrum. Eng. 1367, 221 (1990).

Shaw, H. J.

Simon, A.

Tsubokawa, M.

Ulrich, R.

Yoshino, T.

K. Kurosawa, S. Hattori, T. Yoshino, Proc. Soc. Photo-Opt. Instrum. Eng. 798, 36 (1987).

Youngquist, R. C.

Appl. Opt. (2)

Electron. Lett. (1)

J. Noda, T. Hosaka, Y. Sasaki, Electron. Lett. 20, 906 (1984).
[CrossRef]

Opt. Lett. (2)

Phys. Rep. (1)

A. J. Rogers, Phys. Rep. 169, 99 (1988).
[CrossRef]

Proc. Soc. Photo-Opt. Instrum. Eng. (3)

A. D. Kersey, Proc. Soc. Photo-Opt. Instrum. Eng. 1367, 2 (1990).

L. Fei, Y. Muolin, H. Shanlian, Proc. Soc. Photo-Opt. Instrum. Eng. 1367, 221 (1990).

K. Kurosawa, S. Hattori, T. Yoshino, Proc. Soc. Photo-Opt. Instrum. Eng. 798, 36 (1987).

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Figures (3)

Fig. 1
Fig. 1

Experimental setup.

Fig. 2
Fig. 2

Fiber was squeezed at three points, with coordinates z = 19.7 cm, z = 56.0 cm, and z = 83.7 cm. Experimental results were used to calculate (a) the dependence of the output spectrum on wave number and (b) the fast Fourier transform of (a), where the horizontal axis corresponds to position along the fiber.

Fig. 3
Fig. 3

Fiber was squeezed at two points, with coordinates z = 22.0 cm and z = 22.3 cm. Experimental results were used to calculate (a) the dependence of the output spectrum on wave number and (b), (c) the mode-coupling coefficient distribution without (b) and with (c) compensation of birefringence dispersion.

Equations (5)

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I out ( ν ) = I in ( ν ) [ 1 + 2 k cos ( 2 π ν z Δ n ) ] ,
S ( ν ) = 1 + 2 0 L k ( z ) cos ( 2 π ν z Δ n ) d z ,
L max = b λ min ( λ min + Δ λ ) λ ref Δ λ b λ min 2 λ ref Δ λ ,
Δ z = b λ min λ max λ ref ( λ max λ min ) ,
N = L λ ref b λ max λ min λ max λ min .

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