Abstract

We propose and experimentally demonstrate the use of cyclic pulse coding to improve the performance of hybrid Raman/fiber Bragg grating (FBG) fiber-optic sensors, for simultaneous measurement of distributed static temperature and discrete dynamic strain over the same sensing fiber. Effective noise reduction is achieved in both Raman optical time-domain reflectometry and dynamic interrogation of time-division-multiplexed fiber FBG sensors, enhancing the sensing range resolution and providing real-time point dynamic strain measurement capabilities. The highly integrated sensor scheme employs broadband apodized low-reflectivity FBGs, a single narrowband optical source, and a shared receiver block.

© 2013 Optical Society of America

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References

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  1. B. Culshaw and A. Kersey, J. Lightwave Technol. 26, 1064 (2008).
    [CrossRef]
  2. W. R. Habel and K. Krebber, Photon. Sens. 1, 268 (2011).
    [CrossRef]
  3. M. A. Soto, T. Nannipieri, A. Signorini, A. Lazzeri, F. Baronti, R. Roncella, G. Bolognini, and F. Di Pasquale, Opt. Lett. 36, 2557 (2011).
    [CrossRef]
  4. M. A. Soto, G. Bolognini, F. Di Pasquale, and L. Thevénaz, Opt. Lett. 35, 259 (2010).
    [CrossRef]
  5. I. Toccafondo, M. Taki, A. Signorini, F. Zaidi, T. Nannipieri, S. Faralli, and F. Di Pasquale, Opt. Lett. 37, 4434 (2012).
    [CrossRef]
  6. F. Venuti, “Multi-core approach for real-time fiber optic sensing systems,” Master’s thesis (University of Pisa and Scuola Superiore Sant’Anna, 2010–2011).

2012 (1)

2011 (2)

2010 (1)

2008 (1)

Baronti, F.

Bolognini, G.

Culshaw, B.

Di Pasquale, F.

Faralli, S.

Habel, W. R.

W. R. Habel and K. Krebber, Photon. Sens. 1, 268 (2011).
[CrossRef]

Kersey, A.

Krebber, K.

W. R. Habel and K. Krebber, Photon. Sens. 1, 268 (2011).
[CrossRef]

Lazzeri, A.

Nannipieri, T.

Roncella, R.

Signorini, A.

Soto, M. A.

Taki, M.

Thevénaz, L.

Toccafondo, I.

Venuti, F.

F. Venuti, “Multi-core approach for real-time fiber optic sensing systems,” Master’s thesis (University of Pisa and Scuola Superiore Sant’Anna, 2010–2011).

Zaidi, F.

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Figures (4)

Fig. 1.
Fig. 1.

Integrated Raman/FBG experimental setup.

Fig. 2.
Fig. 2.

FBG back-reflected 100 traces of (a) single pulse and (b) 63 bit decoded at room temperature from SP2 (c) RDTS anti-stokes traces.

Fig. 3.
Fig. 3.

FBG time-domain reflected pulses at different temperatures from SP2 (a) with single pulse and (b) with 63 bit-decoded traces. (c) RDTS temperature profile. (d) RDTS temperature resolution versus distance.

Fig. 4.
Fig. 4.

Dynamic strain measurements at 0.25 kHz. (a) Sinusoidal reconstruction with single-pulse and (b) with 63 bit code word. (c) Normalized FFT of single pulse and (d) with 63 bit code word.

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