Describe the construction operation and uses of a ring laser gyroscope?

A ring laser gyroscope (RLG) operates based on the Sagnac effect, utilizing two counter-propagating laser beams in a closed loop. When the gyroscope rotates, the path length for one beam is slightly longer than the other, causing a phase shift that can be measured to determine the rate of rotation. RLGs are widely used in inertial navigation systems for aircraft, spacecraft, and submarines due to their high precision and reliability, as well as in applications requiring stabilization and orientation. Their solid-state design ensures durability and minimal maintenance compared to traditional gyroscopes.