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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 27,
  • Issue 15,
  • pp. 3143-3149
  • (2009)

Self-Enclosed All-Fiber In-Line Etalon Strain Sensor Micromachined by 157-nm Laser Pulses

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Abstract

An in-line all-fiber etalon, formed by a self-enclosed Fabry–Perot cavity inside an optical fiber fabricated by using 157-nm laser micromachining, is first demonstrated in this paper. This etalon has almost perfect sensor characteristics, such as excellent interferometric fringe contrast of up to ${\sim}30$ dB, low thermal cross-sensitivity, great potential to realize mass-production with good reproducibility, low cost, super capability to operate in harsh environments, etc. The static, quasi-static, and dynamic strain characteristics of the etalon sensor are investigated, which prove that such an etalon could meet versatile applications for strain measurement.

© 2009 IEEE

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