GRAVITATIONAL WAVE DETECTOR Russian patent published in 2011 - IPC G01V7/00 

FIELD: physics.

SUBSTANCE: invention relates to laser interferometre gravitational wave (GW) detectors and can be used to detect low-frequency periodic GW signals from double relativistic astrophysical objects. The GW detector has an active element and a working medium inside the active element, first, second and third totally reflecting mirrors, a semitransparent dividing mirror, first and second polarisers, a linear polariser and a photodetector with a signal processing unit. Optical elements form two standing wave optical resonators. The GW detector is characterised by that it includes two additional mirrors. The semitransparent dividing mirror is placed in such a way that it provides angle of reflection of the optical beam relative the incident optical beam less than 45°, wherein there is equality between the sum of geometrical lengths from the second totally reflecting mirror to the first additional totally reflecting mirror and from the second additional totally reflecting mirror to the semitransparent dividing mirror, and of the geometrical length from the semitransparent dividing mirror to the third totally reflecting mirror.

EFFECT: providing reaction of the GW detector on gravitational radiation only with a horizontal polarisation vector, which is parallel to the two additional totally reflecting mirrors, which provides direction finding of gravitational radiation from low-frequency periodic relativistic astrophysical objects.

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