Abstract

We study the principle of correlation-based distributed generation and readout of dynamic grating spectrum generated in stimulated Brillouin scattering in a polarization-maintaining optical fiber. The experimental validation is demonstrated by applying synchronous sinusoidal frequency modulations to two orthogonally polarized laser sources that serve as the Brillouin pump–probe light and readout light of the dynamic grating, respectively. Temperature-induced opposite changes in the Brillouin frequency shift and in the birefringence-determined optical frequency deviation are clearly observed with 1.2m spatial resolution and a 110m measurement range.

© 2009 Optical Society of America

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  1. K. Hotate and M. Tanaka, IEEE Photon. Technol. Lett. 14, 179 (2002).
    [CrossRef]
  2. K. Y. Song, Z. He, and K. Hotate, Opt. Lett. 31, 2526 (2006).
    [CrossRef] [PubMed]
  3. A. Fellay, L. Thevenaz, M. Facchini, M. Nikles, and P. Robert, in Proceedings of International Conference on Optical Fiber Sensors (1997) p. 324.
  4. L. Zou, X. Bao, Y. Wan, and L. Chen, Opt. Lett. 30, 370 (2005).
    [CrossRef] [PubMed]
  5. W. Zou, Z. He, and K. Hotate, J. Lightwave Technol. 26, 1854 (2008).
    [CrossRef]
  6. W. Zou, Z. He, and K. Hotate, Opt. Express 17, 1248 (2009).
    [CrossRef] [PubMed]
  7. K. Y. Song, W. Zou, Z. He, and K. Hotate, Opt. Lett. 33, 926 (2008).
    [CrossRef] [PubMed]
  8. K. Hotate and T. Hasegawa, IEICE Trans. Electron. E83-C, 405 (2000).

2009 (1)

2008 (2)

2006 (1)

2005 (1)

2002 (1)

K. Hotate and M. Tanaka, IEEE Photon. Technol. Lett. 14, 179 (2002).
[CrossRef]

2000 (1)

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

Bao, X.

Chen, L.

Facchini, M.

A. Fellay, L. Thevenaz, M. Facchini, M. Nikles, and P. Robert, in Proceedings of International Conference on Optical Fiber Sensors (1997) p. 324.

Fellay, A.

A. Fellay, L. Thevenaz, M. Facchini, M. Nikles, and P. Robert, in Proceedings of International Conference on Optical Fiber Sensors (1997) p. 324.

Hasegawa, T.

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

He, Z.

Hotate, K.

Nikles, M.

A. Fellay, L. Thevenaz, M. Facchini, M. Nikles, and P. Robert, in Proceedings of International Conference on Optical Fiber Sensors (1997) p. 324.

Robert, P.

A. Fellay, L. Thevenaz, M. Facchini, M. Nikles, and P. Robert, in Proceedings of International Conference on Optical Fiber Sensors (1997) p. 324.

Song, K. Y.

Tanaka, M.

K. Hotate and M. Tanaka, IEEE Photon. Technol. Lett. 14, 179 (2002).
[CrossRef]

Thevenaz, L.

A. Fellay, L. Thevenaz, M. Facchini, M. Nikles, and P. Robert, in Proceedings of International Conference on Optical Fiber Sensors (1997) p. 324.

Wan, Y.

Zou, L.

Zou, W.

IEEE Photon. Technol. Lett. (1)

K. Hotate and M. Tanaka, IEEE Photon. Technol. Lett. 14, 179 (2002).
[CrossRef]

IEICE Trans. Electron. (1)

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

J. Lightwave Technol. (1)

Opt. Express (1)

Opt. Lett. (3)

Other (1)

A. Fellay, L. Thevenaz, M. Facchini, M. Nikles, and P. Robert, in Proceedings of International Conference on Optical Fiber Sensors (1997) p. 324.

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Figures (4)

Fig. 1
Fig. 1

(a) Beat power spectrum distribution S ( z ) near the correlation peak. The local DGS when the optical frequency of readout wave is (b) not modulated or (c) modulated synchronously to the modulation to pump light. The top plots show the measured DGS for (b) or for (c) when the correlation peak is localized in a heated segment.

Fig. 2
Fig. 2

Experimental configuration for distributed generating and measuring the BGS and DGS in a PMF. The abbreviations are explained in the text body. Inset A depicts the optical power spectra of two modulated DFB-LDs both with 2 Δ f = 18 GHz , where the gray curve has 6 GHz offset from the black curve corresponding to a reduced dc injection current to DFB-LD2.

Fig. 3
Fig. 3

(a) Detected DGS for different FM modulation depths of DFB-LD1 when no FM is applied into DFB-LD2. (b) The detected DGS for a heated PMF segment localized at the correlation peak position but with different fiber lengths when FMs are synchronously applied to both DFB-LDs.

Fig. 4
Fig. 4

Distributed measurement results. (a) Prepared PMF sample. (b) Examples of 3D distribution of measured BGS and DGS from 2 to 9 m when the heater is turned on. (c) Summarization of detected BFS ν B (upper) or frequency deviation f y x (lower) and their temperature-induced changes near the heated segments. Solid-circle line (open-triangle line) corresponds to the heater being turned off (on); solid-star line indicates the temperature-induced changes between the heater’s on–off states.

Equations (3)

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Δ z B = c 2 n eff f m Δ ν B π Δ f ,
d m = c 2 n eff f m ,
Δ z D = c 2 n eff f m Δ f y x π Δ f .

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