The field of the invention is that of solid-state laser gyros. One of the major problems inherent in this technology is that the optical cavity of this type of laser gyro is by nature highly unstable. To reduce this instability, controlled optical are introduced into the cavity that depend on the direction...http://www.google.de/patents/US7446879?utm_source=gb-gplus-sharePatent US7446879 - Solid-state gyrolaser stabilised by acousto-optic devices
