Abstract

Coded optical probe pulses in return-to-zero/non-return-to-zero (RZ/NRZ) formats are used for long-range distance sensing based on a differential pulse-width pair Brillouin optical time-domain analysis (DPP-BOTDA) in order to enhance the spatial resolution and measurement accuracy. It is found that using the RZ format maintains the Brillouin spectral shape, enhances the sensing range and leads to a higher signal-to-noise ratio compared to a single-pulse Brillouin optical time-domain analysis. With 512 bit RZ-coded pulse pairs of 60/55 ns for the DPP-BOTDA, a spatial resolution of 0.5  m and a strain resolution of 12με (which is equivalent to a 0.7 MHz Brillouin frequency shift) have been achieved over a 50 km large effective area fiber.

© 2010 Optical Society of America

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References

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2010 (1)

2009 (2)

M. A. Soto, G. Bolognini, and F. D. Pasquale, IEEE Photon. Technol. Lett. 21, 450 (2009).
[CrossRef]

Y. Dong, X. Bao, and W. Li, Appl. Opt. 48, 4297 (2009).
[CrossRef] [PubMed]

2008 (2)

2001 (1)

1996 (1)

1995 (1)

X. Bao, J. Dhliwayo, N. Heron, D. J. Webb, and D. A. Jackson, J. Lightwave Technol. 13, 1340 (1995).
[CrossRef]

1993 (1)

Alahbabi, M.

M. Alahbabi, Y. T. Cho, and T. P. Newson, in Second European Workshop on Optical Fiber Sensors (2004), p. 484.

Bao, X.

Y. Dong, X. Bao, and W. Li, Appl. Opt. 48, 4297 (2009).
[CrossRef] [PubMed]

W. Li, X. Bao, Y. Li, and L. Chen, Opt. Express 16, 21616 (2008).
[CrossRef] [PubMed]

X. Bao, J. Dhliwayo, N. Heron, D. J. Webb, and D. A. Jackson, J. Lightwave Technol. 13, 1340 (1995).
[CrossRef]

X. Bao, D. J. Webb, and D. A. Jackon, Opt. Lett. 18, 552 (1993).
[CrossRef] [PubMed]

Y. Dong and X. Bao, in 20th International Conference on Optical Fiber Sensors (OFS20) (2009), paper PDP10.

N. Linze, W. Li, and X. Bao, in 20th International Conference on Optical Fiber Sensors (OFS20) (2009), paper 6F.

Bolognini, G.

Chen, L.

Cho, Y. T.

M. Alahbabi, Y. T. Cho, and T. P. Newson, in Second European Workshop on Optical Fiber Sensors (2004), p. 484.

Dhliwayo, J.

X. Bao, J. Dhliwayo, N. Heron, D. J. Webb, and D. A. Jackson, J. Lightwave Technol. 13, 1340 (1995).
[CrossRef]

Dong, Y.

Y. Dong, X. Bao, and W. Li, Appl. Opt. 48, 4297 (2009).
[CrossRef] [PubMed]

Y. Dong and X. Bao, in 20th International Conference on Optical Fiber Sensors (OFS20) (2009), paper PDP10.

Heron, N.

X. Bao, J. Dhliwayo, N. Heron, D. J. Webb, and D. A. Jackson, J. Lightwave Technol. 13, 1340 (1995).
[CrossRef]

Jackon, D. A.

Jackson, D. A.

X. Bao, J. Dhliwayo, N. Heron, D. J. Webb, and D. A. Jackson, J. Lightwave Technol. 13, 1340 (1995).
[CrossRef]

Kee, H. H.

Li, W.

Y. Dong, X. Bao, and W. Li, Appl. Opt. 48, 4297 (2009).
[CrossRef] [PubMed]

W. Li, X. Bao, Y. Li, and L. Chen, Opt. Express 16, 21616 (2008).
[CrossRef] [PubMed]

N. Linze, W. Li, and X. Bao, in 20th International Conference on Optical Fiber Sensors (OFS20) (2009), paper 6F.

Li, Y.

Linze, N.

N. Linze, W. Li, and X. Bao, in 20th International Conference on Optical Fiber Sensors (OFS20) (2009), paper 6F.

Maughan, S. M.

Newson, T. P.

S. M. Maughan, H. H. Kee, and T. P. Newson, Opt. Lett. 26, 331 (2001).
[CrossRef]

M. Alahbabi, Y. T. Cho, and T. P. Newson, in Second European Workshop on Optical Fiber Sensors (2004), p. 484.

Nikles, M.

Pasquale, F. D.

Robert, P. A.

Soto, M. A.

Thevenaz, L.

Thévenaz, L.

Webb, D. J.

X. Bao, J. Dhliwayo, N. Heron, D. J. Webb, and D. A. Jackson, J. Lightwave Technol. 13, 1340 (1995).
[CrossRef]

X. Bao, D. J. Webb, and D. A. Jackon, Opt. Lett. 18, 552 (1993).
[CrossRef] [PubMed]

Appl. Opt. (1)

IEEE Photon. Technol. Lett. (1)

M. A. Soto, G. Bolognini, and F. D. Pasquale, IEEE Photon. Technol. Lett. 21, 450 (2009).
[CrossRef]

J. Lightwave Technol. (1)

X. Bao, J. Dhliwayo, N. Heron, D. J. Webb, and D. A. Jackson, J. Lightwave Technol. 13, 1340 (1995).
[CrossRef]

Opt. Express (2)

Opt. Lett. (4)

Other (3)

Y. Dong and X. Bao, in 20th International Conference on Optical Fiber Sensors (OFS20) (2009), paper PDP10.

N. Linze, W. Li, and X. Bao, in 20th International Conference on Optical Fiber Sensors (OFS20) (2009), paper 6F.

M. Alahbabi, Y. T. Cho, and T. P. Newson, in Second European Workshop on Optical Fiber Sensors (2004), p. 484.

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Figures (3)

Fig. 1
Fig. 1

Experimental setup: PC, polarization controller; EOM, electro-optic modulator; PD, photo-detector; DAQ, data acquisition; FUT, fiber under test; FBG, fiber Bragg grating.

Fig. 2
Fig. 2

(a) Brillouin spectra and (b) time-domain responses at the 2.2 m stressed section using RZ and NRZ coded pulses with 20 ns pulse duration.

Fig. 3
Fig. 3

Time traces at 2.2 m stressed fiber for RZ-coded pulses with pulse duration of 55/60 ns and their differential signal.

Tables (1)

Tables Icon

Table 1 SNR and Spatial Resolution of 512 bit RZ- and NRZ-Coded Pulses for BOTDA

Metrics