FIBRE-OPTIC RING ACOUSTIC EMISSION SENSOR Russian patent published in 2021 - IPC G01H9/00 

FIELD: optics.

SUBSTANCE: group of inventions relates to a fibre-optic sensor and a method for production thereof. Disclosed sensor consists of two coils with optical fibre, arranged one above the other and mechanically connected to each other by an elastic sealant, wherein each coil is connected by free end of optical fibre to fibre multiplexer 1 × 2 by means of fibre-optic welding, forming a Michelson interferometer, and on end of other end of fibre of each coil is sputtered metal film, which serves as mirror. Disclosed method of manufacturing sensor comprises in that during each coil first on one end of optical fibre sputtering metal film, serving as a mirror, then optical fibre is laid in rings, which is ring with external and internal walls, and is filled with epoxy glue, at that, second end of optical fibre remains free, after hardening of the adhesive, the finished coils are removed each of its shape and glued together by means of an elastic sealant, after which the free ends of the optical fibres are connected to multiplexer 1 × 2 by means of fibre-optic welding, forming a Michelson interferometer.

EFFECT: technical result is increase in the sensor measurement accuracy.

2 cl, 2 dwg