Abstract

A new topology for an openable Faraday current sensor is presented with a demonstrated resolution of 7.2mA/Hz over a measurement range from 1 to 1500 A. The sensitivity of the system is 2.21 × 10−5 rad/A. Since this sensor is fabricated in an openable form, emulating a conventional current clamp, it can be used either in permanent installations or for short-term diagnostic studies.

© 1993 Optical Society of America

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References

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  1. G. W. Day, Optical Fiber Sensors, Vol. 44 of Springer Series in Physics (Springer-Verlag, Berlin, 1988), p. 250.
  2. A. J. Rogers, Int. J. Optoelectron. 3, 391 (1988).
  3. Y. N. Ning, B. C. B. Chu, D. A. Jackson, Opt. Lett. 16, 1996 (1991).
    [CrossRef] [PubMed]
  4. B. P. Bush, D. A. Jackson, Appl. Opt. 31, 5366 (1992).
    [CrossRef] [PubMed]
  5. A. M. Smith, Opt. Lasers Technol. 12, 25 (1980).
    [CrossRef]
  6. B. C. B. Chu, Y. N. Ning, D. A. Jackson, Opt. Lett. 17, 1167 (1992).
    [CrossRef] [PubMed]

1992

1991

1988

A. J. Rogers, Int. J. Optoelectron. 3, 391 (1988).

1980

A. M. Smith, Opt. Lasers Technol. 12, 25 (1980).
[CrossRef]

Appl. Opt.

Int. J. Optoelectron.

A. J. Rogers, Int. J. Optoelectron. 3, 391 (1988).

Opt. Lasers Technol.

A. M. Smith, Opt. Lasers Technol. 12, 25 (1980).
[CrossRef]

Opt. Lett.

Other

G. W. Day, Optical Fiber Sensors, Vol. 44 of Springer Series in Physics (Springer-Verlag, Berlin, 1988), p. 250.

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Figures (6)

Fig. 1
Fig. 1

Topology of the OCC. The aperture determines the overall size of the sensing element, which may be scaled up or down depending on the applications.

Fig. 2
Fig. 2

Experimental arrangement used in this study.

Fig. 3
Fig. 3

Variation of the output signal as a function of the input ac current for (a) small currents and (b) large currents. The errors related to the data shown in (b) are less than the squares defining the data point.

Fig. 4
Fig. 4

Variation of the output signal as a function of the input dc current.

Fig. 5
Fig. 5

Frequency response of the sensor.

Fig. 6
Fig. 6

Simulation results showing that the sensitivity of the sensor reduces as a function of the offset angle.

Equations (2)

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Φ F = l V H · d l ,
Φ F = V N F I ,

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