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- W2048367088 abstract "We demonstrate experimentally significant improvement in the sensitivity of photoelectromotive-force (photo-EMF) laser vibrometers using pulsed-light sources. The vibrating surface is discretely sampled by individual laser pulses and recorded by the photo-EMF sensor via the generation of photocurrent pulses whose magnitudes are proportional to the instantaneous surface displacements. With a sufficiently high sampling rate, reconstruction of the vibration wave form can be achieved by conducting envelope (or peak) detection of the resultant series of photocurrent pulses. Significantly higher peak optical power levels of the probe laser pulses, which can be orders of magnitude greater than those of continuous-wave interrogation lasers with the same average power, lead to proportional enhancement in the photo-EMF response and remarkable improvement in detection sensitivity when the photodetection process is initially amplifier noise current limited." @default.
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- W2048367088 date "2003-08-26" @default.
- W2048367088 modified "2023-10-17" @default.
- W2048367088 title "Pulsed-laser vibrometer using photoelectromotive-force sensors" @default.
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- W2048367088 doi "https://doi.org/10.1063/1.1606882" @default.
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