Abstract

We propose and experimentally demonstrate a high-resolution distributed measurement of the Brillouin gain spectrum in a polarization-maintaining fiber (PMF) using Brillouin dynamic grating. In our approach, acoustic waves which contain the information of the local Brillouin frequency are generated by a long pump pulse in one polarization along the PMF and are read out by a short probe pulse with an orthogonal polarization at a different optical frequency from the pump. In experiments, a distributed strain measurement with a 10 cm spatial resolution is demonstrated in a 105 m PMF.

© 2009 Optical Society of America

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References

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    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
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2009 (2)

2008 (1)

2006 (1)

2000 (1)

K. Hotate and T. Hasegawa, IEICE Trans. Electron. E83-C, 405 (2000).

1997 (1)

M. Nikles, L. Thevenaz, and P. A. Robert, J. Lightwave Technol. 15, 1842 (1997).
[CrossRef]

1993 (1)

Bao, X.

Che-Hien, L.

L. Che-Hien, T. Tsuda, and K. Kishida, PPP-BOTDA Method to Achieve cm-Order Spatial Resolution in Brillouin Distributed Measuring Technique, Tech. Rep. OFT 2005 (IEICE, 2005).

Chen, L.

Hasegawa, T.

K. Hotate and T. Hasegawa, IEICE Trans. Electron. E83-C, 405 (2000).

He, Z.

Hotate, K.

Jackson, D. A.

Kalosha, V. P.

Kishida, K.

L. Che-Hien, T. Tsuda, and K. Kishida, PPP-BOTDA Method to Achieve cm-Order Spatial Resolution in Brillouin Distributed Measuring Technique, Tech. Rep. OFT 2005 (IEICE, 2005).

Nikles, M.

M. Nikles, L. Thevenaz, and P. A. Robert, J. Lightwave Technol. 15, 1842 (1997).
[CrossRef]

Ponomarev, E. A.

Robert, P. A.

M. Nikles, L. Thevenaz, and P. A. Robert, J. Lightwave Technol. 15, 1842 (1997).
[CrossRef]

Song, K. Y.

Thevenaz, L.

M. Nikles, L. Thevenaz, and P. A. Robert, J. Lightwave Technol. 15, 1842 (1997).
[CrossRef]

Tsuda, T.

L. Che-Hien, T. Tsuda, and K. Kishida, PPP-BOTDA Method to Achieve cm-Order Spatial Resolution in Brillouin Distributed Measuring Technique, Tech. Rep. OFT 2005 (IEICE, 2005).

Webb, D. J.

Zou, W.

IEICE Trans. Electron. (1)

K. Hotate and T. Hasegawa, IEICE Trans. Electron. E83-C, 405 (2000).

J. Lightwave Technol. (1)

M. Nikles, L. Thevenaz, and P. A. Robert, J. Lightwave Technol. 15, 1842 (1997).
[CrossRef]

Opt. Express (1)

Opt. Lett. (4)

Other (1)

L. Che-Hien, T. Tsuda, and K. Kishida, PPP-BOTDA Method to Achieve cm-Order Spatial Resolution in Brillouin Distributed Measuring Technique, Tech. Rep. OFT 2005 (IEICE, 2005).

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Figures (6)

Fig. 1
Fig. 1

The generation and the reading of BDG in a PMF. Note that Δ f is determined by the local birefringence.

Fig. 2
Fig. 2

Acquisition of a local BGS with a short pulse in (a) standard BOTDA system by way of probe-gain variation, and (b) BDG-based BOTDA system by way of BDG-strength variation.

Fig. 3
Fig. 3

Experimental setup for the BDG-based BOTDA system: LD, laser diode; EOM, electro-optic modulator; SSBM, single-sideband modulator; EDFA, Er-doped fiber amplifier; PBS, polarization beam splitter; DAQ, data acquisition card; TNF, tunable notch filter; PD, photo detector. The inset shows the structure of the FUT.

Fig. 4
Fig. 4

(a) Plot of pump 1 (x polarization) and probe (y polarization) pulses measured by PD2 in Fig. 3. The inset is the zoomed view of the probe pulse. Note that the amplitude of pump 1 is 20 dB smaller than the real value due to PBS2. (b) Optical spectra measured in front of PD1 with (black curve) and without (gray curve) TNF.

Fig. 5
Fig. 5

(a) Distribution maps of ν B along the FUT acquired by the BDG-based BOTDA system. (b) Zoomed views of the dashed boxes A and B (near strain-applied sections).

Fig. 6
Fig. 6

(a) Local BGS at the strain-applied section (box B in Fig. 5) with different strains (0, 600, 1200 μ ε for each). (b) Variation in ν B ( Δ ν B ) as a function of strain at the strain-applied section (box B in Fig. 5). The line is the result of a linear fit.

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