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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 21 — Oct. 16, 2006
  • pp: 9679–9686

High resolution (<1nm) interferometric fiber-optic sensor of vibrations in high-power transformers

Jose A. Garcia-Souto and Horacio Lamela-Rivera  »View Author Affiliations

Optics Express, Vol. 14, Issue 21, pp. 9679-9686 (2006)

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A novel fiber-optic interferometric sensor is presented for vibrations measurements and analysis. In this approach, it is shown applied to the vibrations of electrical structures within power transformers. A main feature of the sensor is that an unambiguous optical phase measurement is performed using the direct detection of the interferometer output, without external modulation, for a more compact and stable implementation. High resolution of the interferometric measurement is obtained with this technique (<1 nm). The optical-fiber transducer is also specifically designed for magnifying the localized vibrations in order to modulate deeply the interferometric signal. Other advantages of the implementation for measurements within transformers are also highlighted.

© 2006 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.4290) Instrumentation, measurement, and metrology : Nondestructive testing
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: June 12, 2006
Revised Manuscript: September 27, 2006
Manuscript Accepted: September 29, 2006
Published: October 16, 2006

Jose A. Garcia-Souto and Horacio Lamela-Rivera, "High resolution (<1nm) interferometric fiber-optic sensor of vibrations in high-power transformers," Opt. Express 14, 9679-9686 (2006)

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