Abstract

We present a new all-optical fiber-referencing scheme for intensity-modulated sensors. It consists of a closed loop traversed by sensing and reference optical signals in opposite directions. With the proposed scheme the noise induced by power fluctuations of the optical source and mechanical perturbations can be greatly reduced. We experimentally demonstrate the efficiency of the scheme and discuss its use in a sensor array.

© 2004 Optical Society of America

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References

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  1. F. T. S. Yu and S. Yin, Fiber Optic Sensors, 1st ed. (Marcel Dekker, New York, 2002).
    [CrossRef]
  2. P. M. Cavaleiro, A. B. Lobo Ribeiro, and J. L. Santos, Electron. Lett. 31, 392 (1995).
    [CrossRef]
  3. A. Wang, H. Xiao, J. Wang, Z. Wang, W. Zhao, and R. G. May, J. Lightwave Technol. 19, 1495 (2001).
    [CrossRef]
  4. R. I. MacDonald and R. Nychka, Electron. Lett. 27, 2194 (1991).
    [CrossRef]

2001 (1)

1995 (1)

P. M. Cavaleiro, A. B. Lobo Ribeiro, and J. L. Santos, Electron. Lett. 31, 392 (1995).
[CrossRef]

1991 (1)

R. I. MacDonald and R. Nychka, Electron. Lett. 27, 2194 (1991).
[CrossRef]

Cavaleiro, P. M.

P. M. Cavaleiro, A. B. Lobo Ribeiro, and J. L. Santos, Electron. Lett. 31, 392 (1995).
[CrossRef]

Lobo Ribeiro, A. B.

P. M. Cavaleiro, A. B. Lobo Ribeiro, and J. L. Santos, Electron. Lett. 31, 392 (1995).
[CrossRef]

MacDonald, R. I.

R. I. MacDonald and R. Nychka, Electron. Lett. 27, 2194 (1991).
[CrossRef]

May, R. G.

Nychka, R.

R. I. MacDonald and R. Nychka, Electron. Lett. 27, 2194 (1991).
[CrossRef]

Santos, J. L.

P. M. Cavaleiro, A. B. Lobo Ribeiro, and J. L. Santos, Electron. Lett. 31, 392 (1995).
[CrossRef]

Wang, A.

Wang, J.

Wang, Z.

Xiao, H.

Yin, S.

F. T. S. Yu and S. Yin, Fiber Optic Sensors, 1st ed. (Marcel Dekker, New York, 2002).
[CrossRef]

Yu, F. T. S.

F. T. S. Yu and S. Yin, Fiber Optic Sensors, 1st ed. (Marcel Dekker, New York, 2002).
[CrossRef]

Zhao, W.

Electron. Lett. (2)

P. M. Cavaleiro, A. B. Lobo Ribeiro, and J. L. Santos, Electron. Lett. 31, 392 (1995).
[CrossRef]

R. I. MacDonald and R. Nychka, Electron. Lett. 27, 2194 (1991).
[CrossRef]

J. Lightwave Technol. (1)

Other (1)

F. T. S. Yu and S. Yin, Fiber Optic Sensors, 1st ed. (Marcel Dekker, New York, 2002).
[CrossRef]

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Figures (4)

Fig. 1
Fig. 1

Schematic of the fiber-optic referencing scheme. D1, D2, photodetectors; V.A., variable attenuator; Rs, fiber-optic circulators.

Fig. 2
Fig. 2

Output voltages for a laser power increase of 100% at 400 s.

Fig. 3
Fig. 3

Output voltages Vs, Vr, and Vs-Vr with induced microbending of 5-mm radius.

Fig. 4
Fig. 4

Output voltages with a bend perturbation of 3 dB applied between 400 and 700 s.

Equations (3)

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Sout=VsVr=AsTfol+κArTva-Tfol-1-κTSE,
Soutp=α+α-TSE.
NCR=α-α+-1Δα,

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