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[en] For the intruder detection, a buried fiber-optic sensor based on fiber-optic Mach-Zehnder interferometer is demonstrated. We buried the sensor arm in a styrene board and exerted pressure on it. The pressure-induced deformation speed has almost linear relationship with the output frequencies of the interference signals, and about 4.25 Hz frequency change per 0.01m/s was obtained. Also it has been shown that the amplitude of frequency component increases according to the weight of mass
Journal
Journal of the Korean Society for Nondestructive Testing; ISSN 1225-7842; 
; v. 26(4); p. 255-259
; v. 26(4); p. 255-259