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

Momoyo Enyama; Kazuo Hotate

doi:10.1117/12.571357

14 December 2004 Dynamic and random-access strain measurement by fiber Bragg gratings with synthesis of optical coherence function

Momoyo Enyama, Kazuo Hotate

Author Affiliations +

Proceedings Volume 5589, Fiber Optic Sensor Technology and Applications III; (2004) https://doi.org/10.1117/12.571357
Event: Optics East, 2004, Philadelphia, Pennsylvania, United States

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.

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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, (14 December 2004); https://doi.org/10.1117/12.571357

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