Abstract

A new scheme is proposed for sensing distributed strain and temperature in optical fibers. This scheme uses Brillouin scattering as the sensing mechanism and a branched optical fiber network as the sensing fibers. Brillouin optical time-domain reflectometry makes it possible to distinguish Brillouin-scattered light waves from different optical fiber branches in the network when the different Brillouin frequency shifts are assigned to each branch. The technical feasibility of this scheme is confirmed experimentally for a branched optical network composed of two branches connected to a trunk optical fiber.

© 1995 Optical Society of America

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References

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    [CrossRef]
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    [CrossRef] [PubMed]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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1994

K. Shimizu, T. Horiguchi, Y. Koyamada, T. Kurashima, Lightwave Technol. 12, 730 (1994).
[CrossRef]

1992

T. Horiguchi, T. Kurashima, Y. Koyamada, Proc. Soc. Photo-Opt. Instrum. Eng. 1797, 2 (1992).

1990

T. Horiguchi, T. Kurashima, M. Tateda, IEEE Photon. Technol. Lett. 2, 352 (1990).
[CrossRef]

T. Kurashima, T. Horiguchi, M. Tateda, Opt. Lett. 15, 1038 (1990).
[CrossRef] [PubMed]

1986

R. W. Tkach, A. R. Chraplyvy, R. M. Derosier, Electron. Lett. 22, 1012 (1986).

1985

J. P. Dakin, D. J. Patt, G. W. Bibby, J. N. Ross, Electron. Lett. 21, 569 (1985).
[CrossRef]

1976

Barnoski, M. K.

Bibby, G. W.

J. P. Dakin, D. J. Patt, G. W. Bibby, J. N. Ross, Electron. Lett. 21, 569 (1985).
[CrossRef]

Chraplyvy, A. R.

R. W. Tkach, A. R. Chraplyvy, R. M. Derosier, Electron. Lett. 22, 1012 (1986).

Dakin, J. P.

J. P. Dakin, D. J. Patt, G. W. Bibby, J. N. Ross, Electron. Lett. 21, 569 (1985).
[CrossRef]

Derosier, R. M.

R. W. Tkach, A. R. Chraplyvy, R. M. Derosier, Electron. Lett. 22, 1012 (1986).

Horiguchi, T.

K. Shimizu, T. Horiguchi, Y. Koyamada, T. Kurashima, Lightwave Technol. 12, 730 (1994).
[CrossRef]

T. Horiguchi, T. Kurashima, Y. Koyamada, Proc. Soc. Photo-Opt. Instrum. Eng. 1797, 2 (1992).

T. Horiguchi, T. Kurashima, M. Tateda, IEEE Photon. Technol. Lett. 2, 352 (1990).
[CrossRef]

T. Kurashima, T. Horiguchi, M. Tateda, Opt. Lett. 15, 1038 (1990).
[CrossRef] [PubMed]

Jensen, S. M.

Koyamada, Y.

K. Shimizu, T. Horiguchi, Y. Koyamada, T. Kurashima, Lightwave Technol. 12, 730 (1994).
[CrossRef]

T. Horiguchi, T. Kurashima, Y. Koyamada, Proc. Soc. Photo-Opt. Instrum. Eng. 1797, 2 (1992).

Kurashima, T.

K. Shimizu, T. Horiguchi, Y. Koyamada, T. Kurashima, Lightwave Technol. 12, 730 (1994).
[CrossRef]

T. Horiguchi, T. Kurashima, Y. Koyamada, Proc. Soc. Photo-Opt. Instrum. Eng. 1797, 2 (1992).

T. Horiguchi, T. Kurashima, M. Tateda, IEEE Photon. Technol. Lett. 2, 352 (1990).
[CrossRef]

T. Kurashima, T. Horiguchi, M. Tateda, Opt. Lett. 15, 1038 (1990).
[CrossRef] [PubMed]

Patt, D. J.

J. P. Dakin, D. J. Patt, G. W. Bibby, J. N. Ross, Electron. Lett. 21, 569 (1985).
[CrossRef]

Ross, J. N.

J. P. Dakin, D. J. Patt, G. W. Bibby, J. N. Ross, Electron. Lett. 21, 569 (1985).
[CrossRef]

Shimizu, K.

K. Shimizu, T. Horiguchi, Y. Koyamada, T. Kurashima, Lightwave Technol. 12, 730 (1994).
[CrossRef]

Tateda, M.

T. Horiguchi, T. Kurashima, M. Tateda, IEEE Photon. Technol. Lett. 2, 352 (1990).
[CrossRef]

T. Kurashima, T. Horiguchi, M. Tateda, Opt. Lett. 15, 1038 (1990).
[CrossRef] [PubMed]

Tkach, R. W.

R. W. Tkach, A. R. Chraplyvy, R. M. Derosier, Electron. Lett. 22, 1012 (1986).

Appl. Opt.

Electron. Lett.

J. P. Dakin, D. J. Patt, G. W. Bibby, J. N. Ross, Electron. Lett. 21, 569 (1985).
[CrossRef]

R. W. Tkach, A. R. Chraplyvy, R. M. Derosier, Electron. Lett. 22, 1012 (1986).

IEEE Photon. Technol. Lett.

T. Horiguchi, T. Kurashima, M. Tateda, IEEE Photon. Technol. Lett. 2, 352 (1990).
[CrossRef]

Lightwave Technol.

K. Shimizu, T. Horiguchi, Y. Koyamada, T. Kurashima, Lightwave Technol. 12, 730 (1994).
[CrossRef]

Opt. Lett.

Proc. Soc. Photo-Opt. Instrum. Eng.

T. Horiguchi, T. Kurashima, Y. Koyamada, Proc. Soc. Photo-Opt. Instrum. Eng. 1797, 2 (1992).

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Figures (6)

Fig. 1
Fig. 1

Configuration of fiber-optic sensor network for OTDR: (a) a sensor network using a single optical fiber, (b) a sensor network based on a branched optical fiber network.

Fig. 2
Fig. 2

Configuration of the Brillouin OTDR used in the experiment.

Fig. 3
Fig. 3

Configuration of the branched network used in the experiment.

Fig. 4
Fig. 4

Profiles of Brillouin-scattered power with respect to distance for different probe frequency shifts.

Fig. 5
Fig. 5

Measured Brillouin spectra for different distances from the near end of the trunk fiber.

Fig. 6
Fig. 6

Measured Brillouin frequency shift distributed in the branched optical fiber network. A–E denote the different fibers used.

Tables (1)

Tables Icon

Table 1 Optical Fiber Parameters

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