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Photonics Maintaining Competitiveness in the Information Era (1988) / Chapter Skim
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Appendix E: Fiber-Optic Sensor Performance
Pages 95-97

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From page 95...
... Performance parameters of these sensors are shown in Table 5.1. In the case of the hydrophore, various configurations of packaged interferometer hydrophores have routinely achieved detection levels equal to or better than conventional piezoelectric devices.
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From page 96...
... This lag in development is due to the fact that conventional pressure sensors, which offer low cost and adequate resolution, are readily available for most commercial and military applications; furthermore, the quantity of pressure sensors required is surprisingly small compared to other sensor types such as those used for temperature, liquid level, and flow. In spite of an excellent research base, the commercialization of f~beroptic pressure sensors requires the identification of unique applications where their total dielectric nature provides a significant advantage over conventional technology.
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From page 97...
... These devices typically fall into two categories. Either fiber termination senses the liquid level through a coupling of guided optical modes to radiated optical modes in a region where the core of the fiber is exposed to the liquid, or the fiber is terminated in a prism where total internal reflection is used to couple the guided energy into a return fiber.
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Key Terms

  • pressure sensors
  • phase shift
  • sensors based
  • sensor types
  • laser doppler

  • electrically noisy
  • conventional piezoelectric
  • liquid level
  • dielectric nature
  • optical modes

  • stable output
  • sensors depends
  • chlorine production
  • total internal
  • fiber core

  • conventional pressure
  • doppler velocimetry
  • monitor excessive
  • vim result
  • index variations

  • measuring acceleration
  • routinely achieved
  • explosive environment
  • gradual evolution
  • levels equal

  • electrically based
  • contains explosive
  • detection levels
  • sagnac phase
  • processing environment


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