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Proceedings Article

Dynamic and random-access strain measurement by fiber Bragg gratings with synthesis of optical coherence function

[+] Author Affiliations
Momoyo Enyama, Kazuo Hotate

Univ. of Tokyo (Japan)

Proc. SPIE 5589, Fiber Optic Sensor Technology and Applications III, 144 (December 14, 2004); doi:10.1117/12.571357
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From Conference Volume 5589

  • Fiber Optic Sensor Technology and Applications III
  • Michael A. Marcus; Brian Culshaw; John P. Dakin
  • Philadelphia, PA | October 25, 2004

abstract

We have proposed and constructed a system to multiplex fiber Bragg grating (FBG) strain sensors with same reflection wavelength, adopting the synthesis of optical coherence function technique (SOCF), which has realized dynamic strain measurement. The ability to control the coherence peak position of SOCF allows random access in the spatial domain. In this paper, the function of random access strain measurement has been realized by switching the coherence peak position at every FBG, synchronizing with FBG spectrum measurement, to use the sampling rate to the full. In addition, we have proposed and confirmed the novel method for improving FBG interval by simply modulating the LD intensity.

© (2004) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Momoyo Enyama and Kazuo Hotate
"Dynamic and random-access strain measurement by fiber Bragg gratings with synthesis of optical coherence function", Proc. SPIE 5589, Fiber Optic Sensor Technology and Applications III, 144 (December 14, 2004); doi:10.1117/12.571357; http://dx.doi.org/10.1117/12.571357


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