Abstract

A novel solgel process for making porous silica fiber and doping the fiber core with sensing material is described. A CoCl2-doped solgel fiber was fabricated and was used to construct an active-core optical fiber moisture sensor. Test results show that the sensitivity of the active-core optical fiber sensor is much higher than that of an evanescent-wave-based optical fiber sensor.

© 2002 Optical Society of America

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References

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  1. K. T. V. Grattan and B. T. Meggitt, eds., Chemical and Environmental Sensing, Vol. 4 of Optical Fiber Sensor Technology (Kluwer Academic, Dordrecht, The Netherlands, 1999).
  2. A. Messica, A. Greenstein, and A. Katzir, Appl. Opt. 35, 2274 (1996).
    [CrossRef] [PubMed]
  3. Q. Zhou, M. R. Shahriari, D. Kritz, and G. H. Sigel, Anal. Chem. 60, 2317 (1988).
    [CrossRef]
  4. G. E. Badini, K. T. V. Grattan, and A. C. C. Tseung, Rev. Sci. Instrum. 66, 4034 (1995).
    [CrossRef]
  5. D. S. Ballantine and H. Wohltjen, Anal. Chem. 58, 2833 (1986).
  6. R. Jindal, S. Tao, J. P. Singh, and P. S. Gaikwad, Proc. SPIE 4578, 314 (2002).
    [CrossRef]

2002 (1)

R. Jindal, S. Tao, J. P. Singh, and P. S. Gaikwad, Proc. SPIE 4578, 314 (2002).
[CrossRef]

1996 (1)

1995 (1)

G. E. Badini, K. T. V. Grattan, and A. C. C. Tseung, Rev. Sci. Instrum. 66, 4034 (1995).
[CrossRef]

1988 (1)

Q. Zhou, M. R. Shahriari, D. Kritz, and G. H. Sigel, Anal. Chem. 60, 2317 (1988).
[CrossRef]

1986 (1)

D. S. Ballantine and H. Wohltjen, Anal. Chem. 58, 2833 (1986).

Badini, G. E.

G. E. Badini, K. T. V. Grattan, and A. C. C. Tseung, Rev. Sci. Instrum. 66, 4034 (1995).
[CrossRef]

Ballantine, D. S.

D. S. Ballantine and H. Wohltjen, Anal. Chem. 58, 2833 (1986).

Gaikwad, P. S.

R. Jindal, S. Tao, J. P. Singh, and P. S. Gaikwad, Proc. SPIE 4578, 314 (2002).
[CrossRef]

Grattan, K. T. V.

G. E. Badini, K. T. V. Grattan, and A. C. C. Tseung, Rev. Sci. Instrum. 66, 4034 (1995).
[CrossRef]

Greenstein, A.

Jindal, R.

R. Jindal, S. Tao, J. P. Singh, and P. S. Gaikwad, Proc. SPIE 4578, 314 (2002).
[CrossRef]

Katzir, A.

Kritz, D.

Q. Zhou, M. R. Shahriari, D. Kritz, and G. H. Sigel, Anal. Chem. 60, 2317 (1988).
[CrossRef]

Messica, A.

Shahriari, M. R.

Q. Zhou, M. R. Shahriari, D. Kritz, and G. H. Sigel, Anal. Chem. 60, 2317 (1988).
[CrossRef]

Sigel, G. H.

Q. Zhou, M. R. Shahriari, D. Kritz, and G. H. Sigel, Anal. Chem. 60, 2317 (1988).
[CrossRef]

Singh, J. P.

R. Jindal, S. Tao, J. P. Singh, and P. S. Gaikwad, Proc. SPIE 4578, 314 (2002).
[CrossRef]

Tao, S.

R. Jindal, S. Tao, J. P. Singh, and P. S. Gaikwad, Proc. SPIE 4578, 314 (2002).
[CrossRef]

Tseung, A. C. C.

G. E. Badini, K. T. V. Grattan, and A. C. C. Tseung, Rev. Sci. Instrum. 66, 4034 (1995).
[CrossRef]

Wohltjen, H.

D. S. Ballantine and H. Wohltjen, Anal. Chem. 58, 2833 (1986).

Zhou, Q.

Q. Zhou, M. R. Shahriari, D. Kritz, and G. H. Sigel, Anal. Chem. 60, 2317 (1988).
[CrossRef]

Anal. Chem. (2)

Q. Zhou, M. R. Shahriari, D. Kritz, and G. H. Sigel, Anal. Chem. 60, 2317 (1988).
[CrossRef]

D. S. Ballantine and H. Wohltjen, Anal. Chem. 58, 2833 (1986).

Appl. Opt. (1)

Proc. SPIE (1)

R. Jindal, S. Tao, J. P. Singh, and P. S. Gaikwad, Proc. SPIE 4578, 314 (2002).
[CrossRef]

Rev. Sci. Instrum. (1)

G. E. Badini, K. T. V. Grattan, and A. C. C. Tseung, Rev. Sci. Instrum. 66, 4034 (1995).
[CrossRef]

Other (1)

K. T. V. Grattan and B. T. Meggitt, eds., Chemical and Environmental Sensing, Vol. 4 of Optical Fiber Sensor Technology (Kluwer Academic, Dordrecht, The Netherlands, 1999).

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Figures (4)

Fig. 1
Fig. 1

Climate chamber and test system for a moisture sensor.

Fig. 2
Fig. 2

Solgel fiber structure observed with a scanning electron microscope.

Fig. 3
Fig. 3

Light transparence of solgel fiber (diameter, 390 µm; length, 0.7 cm).

Fig. 4
Fig. 4

Time response of CoCl2-doped solgel fiber sensor to the change of relative humidity (RH%). Fiber diameter, 390 µm; fiber length, 2 mm; CoCl2%=1.7%.

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