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Optics Letters

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  • Vol. 24, Iss. 8 — Apr. 15, 1999
  • pp: 522–524

Accurate monitoring of an interferometric fiber-optic sensor with a multimode semiconductor laser

J. X. Fang and H. F. Taylor  »View Author Affiliations


Optics Letters, Vol. 24, Issue 8, pp. 522-524 (1999)
http://dx.doi.org/10.1364/OL.24.000522


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Abstract

A technique for monitoring interferometric sensors by correlation of the optical signal from the sensor with the signal from a phase-modulated reference interferometer is described. The technique is applied to temperature measurement with a fiber Fabry–Perot sensing head. We extend the 7 °C unambiguous measurement range obtained with a 1.3-μm laser diode as the light source to 43 °C by adding a second laser diode emitting at 1.55μm . Experimentally, a rms phase-measurement error of ±0.28rad , corresponding to a temperature error of ±0.32°C , was achieved with a low-quality multimode Fabry–Perot laser. The phase error was improved to ±0.14rad , corresponding to a temperature error of ±0.16°C , by use of a distributed-feedback laser diode.

© 1999 Optical Society of America

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.2230) Instrumentation, measurement, and metrology : Fabry-Perot

Citation
J. X. Fang and H. F. Taylor, "Accurate monitoring of an interferometric fiber-optic sensor with a multimode semiconductor laser," Opt. Lett. 24, 522-524 (1999)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-24-8-522


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References

  1. C. E. Lee and H. F. Taylor, Electron. Lett. 24, 193 (1988).
  2. A. D. Kersey, A. Dandridge, and W. K. Burns, Electron. Lett. 22, 935 (1986).
  3. D. J. Webb, J. D. C. Jones, and D. A. Jackson, Electron. Lett. 24, 1173 (1988).

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