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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 29, Iss. 31 — Nov. 1, 1990
  • pp: 4729–4732

Improved sensitivity in sensor fibers by the proper source/coating selection

Fernando Romero-Borja, David L. Schmidt, and Lowell T. Wood  »View Author Affiliations


Applied Optics, Vol. 29, Issue 31, pp. 4729-4732 (1990)
http://dx.doi.org/10.1364/AO.29.004729


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Abstract

The dependence of the optical attenuation on the fiber coating has been measured for a sensor fiber subjected to periodic microbending. The dependence on the spectral characteristics of the selected light sources is also addressed and the proper source/coating combination is discussed. Results indicate that the proper selection of this combination is of crucial importance in the design, development, and performance of fiber optic sensors in which intensity modulated microbending transducers are considered. A combination of a short wavelength for the light source and a fiber coated with a hard, elastomeric material seems to be the optimal selection for enhancing the sensitivity in controlled microbending experiments with applications to fiber optic sensors. The highest sensitivity to microbending was obtained for a nylon coated fiber and using a He–Ne laser at 632.8 nm.

© 1990 Optical Society of America

History
Original Manuscript: December 13, 1989
Published: November 1, 1990

Citation
Fernando Romero-Borja, David L. Schmidt, and Lowell T. Wood, "Improved sensitivity in sensor fibers by the proper source/coating selection," Appl. Opt. 29, 4729-4732 (1990)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-29-31-4729


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References

  1. P. C. P. Bouten, D. J. Broer, C. M. G. Jochem, T. P. M. Meeuwsen, H. J. M. Timmermans, “Doubly Coated Optical Fibers with a Low Sensitivity to Temperature and Microbending,” IEEE/OSA J. Lightwave Technol. LT-7, 680–686 (1989). [CrossRef]
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  5. See e.g., M. Shadaram, “Sensing with Fibers,” Photonics Spectra 6, 117–118 (1989); R. H. Mueller, T. S. Wasilenko, W. Scott Brothers, J. M. Fulton, “Sorting Out the Roles of High- and Low-loss Fibers,” Photonics Spectra 21(6), 69–76 (1987).
  6. Modern Plastics Encyclopedia 1986–87, (McGraw-Hill, New York, 1986), MOPLAY 63(10A), pp. 1–886.
  7. S. D. Wohlstein, “Using Fiber Optics for Practical Sensing,” Lasers & Optronics 8(7), 73–76 (1989).
  8. C. Hentschel, Fiber Optics Handbook (Hewlett-Packard GmbH, FRG, 1988), See “Fiber Coating” and “Mode Stripping of Cladding Modes.”
  9. Eric Bear (Ed.), Engineering Design for Plastics (Reinhold, New York, 1964), see also Ref. 6.
  10. P. E. Wierenga, D. J. Broer, J. H. M. v. d. Linden, “Mechanical Characterization of Optical-Fiber coatings by Ultramicroindentation Measurements,” Appl. Opt. 24, 960–963 (1985); see also “Discussion” in Ref. 1. [CrossRef]
  11. S. F. Pellicori, “Optical Bonding Agents for Severe Environments,” Appl. Opt. 9, 2581–2582 (1970); see also W. L. Wolfe, “Properties of Optical Materials,” Handbook of Optics, W. G. Driscoll, Ed. (McGraw-Hill, New York, 1978). [CrossRef] [PubMed]
  12. L. T. Wood, F. Romero-Borja, R. Hage, “Effects of Radially Induced Periodic Stresses on the Optical Transmission in a Sensor Fiber,” to be submitted for publication to Appl. Opt.

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