Patent ID: 7511821

Claim:
A laser gyro, comprising: an optical block having three communicating resonant optical cavities which form a regular octahedron having eight triangular sides, each of the cavities presenting four capillary segments forming a square perpendicular to a corresponding sensitive axis, these cavities being arranged so that each of the angles of one cavity coincides and communicates with the angle of another cavity, a mirror associated with each pair of coinciding angles being oriented so as to be used by the two cavities forming said pair, each cavity using four mirrors of which two are transmissive, one of them being a reading mirror, and the other two being cavity-length servo mirrors, said gyro further comprising an activation mechanism for driving the block according to a reciprocating rotation movement about an activation axis, wherein the gyro comprises three cathodes each linked to two cavities out of the three, these two cavities being each time taken by circular permutation.