METHOD AND DEVICE FOR FIBER-OPTIC MEASUREMENTS Russian patent published in 2020 - IPC G01D5/353 

FIELD: optical system; measurement equipment.

SUBSTANCE: invention relates to distributed optical fiber sensors with reflecting elements integrated into sensitive optical fiber. Distributed optical fiber detector system comprises an optical radiation source configured to form optical signal pulses, an optical fiber configured to be deployed in the analyzed ambient space to receive optical signal pulses, and a detector device configured to detect radiation of optical signal pulses reflected back along the optical fiber, and to determine, by the level of reflected radiation, the value of one or more of the following values: acoustic level, vibration, temperature, having a disturbing effect on the optical path length in the optical fiber. At that, said fiber contains at least in its first detection area and having reflectivity: i) inversely proportional to the number of reflecting parts in at least the first detection region and ii) proportional to the selected number of crosstalk between the reflective portions in at least the first detection region.

EFFECT: high sensitivity and resolution of the fiber.

36 cl, 37 dwg