FIELD: measuring equipment.
SUBSTANCE: invention relates to a sensitive element polling device. Device includes a laser radiation generator with a pulsed laser and a fiber-optic amplifier, a spectral filter of the scattering components, at least two photodetector modules and a signal processing unit. Spectral filter of scattering components includes at least two demultiplexers with thin-film filters, pegged optical fiber. Fiber-optic amplifier comprises insulator, active fiber, multiplexer and pumping laser. Active fiber is located in front of the multiplexer. Pumping in laser radiation generator is performed in direction opposite to direction of pulse laser radiation.
EFFECT: technical result consists in improvement of device manufacturability and reliability, improvement of measurement accuracy.
20 cl, 1 dwg
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