Abstract
The bonded distributed feedback (DFB) fiber laser (FL) acoustic
emission sensor and the intensity response of the DFB-FL to external
acoustic emissions are investigated. The dynamic sensitivity of the DFB-FL
is calibrated by a referenced piezoelectric receiver. In the DFB-FL we
used here, the minimum detectable signal is 2×10−6 m/s at 5
kHz. Using wavelet packet technology, the collected signals are analyzed,
which confirms that an intensity-modulated DFB-FL sensor can be used to
detect acoustic emission signals.
© 2016 Chinese Laser Press
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