FIELD: measuring.
SUBSTANCE: invention can be used for monitoring of vibroacoustic characteristics of extended objects. Device for monitoring vibroacoustic characteristics of extended objects comprises functionally connected source of laser radiation, double-arm Mach-Zehnder interferometer with input and output splitters and first and second fibre-optic sensitive elements built into like arms, third fibre-optic sensitive element connected to output of output splitter, photodetectors of transmitted and reflected optical signals and processing and control unit, wherein in each arm of the said Mach-Zehnder interferometer between the outputs of the corresponding fibre-optic sensitive element and the input of the corresponding intermediate splitter, an optical circulator and a modulator of the transmitted optical signal are connected in series.
EFFECT: providing the possibility of increasing the quality of the probing signal.
2 cl, 2 dwg
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