Ring laser gyroscope

About: Ring laser gyroscope is a research topic. Over the lifetime, 2070 publications have been published within this topic receiving 18609 citations. The topic is also known as: Sagnac interferometer.

Force-rebalance coriolis vibratory gyroscope

Abstract: An effective and precise method and system for compensation and measurement of a zero-bias in an axisymmetrical CVG (Coriolis Vibrating Gyroscope) is provided. Principal mode is driven according to an X-axis. Angular velocity is measured through Coriolis mode excitation along Y-axis. The sensitive axis of the gyroscope is reversed by 180 degrees by switching input and sense signals. Vibration is then driven along Y-axis and angular velocity is sensed along X-axis. On each position, after an arbitrary period of time, the gyroscope output is stored. Half-difference in outputs between two opposite position gives angular velocity and zero-bias effect is canceled. Half-sum in outputs between two opposite position gives the zero-bias error.

Mirror transducer assembly for ring laser gyroscope

Abstract: Disclosed herein is a Pathlength Control Assembly for Ring Laser Gyroscope comprising, in a preferred embodiment, a mirror, coupled to a mirror housing including a mirror post, wherein the mirror is mounted on an axially deflectable membrane of the housing. A pair of piezoelectric transducers are responsive to an electronic input signal and mounted to a backing plate. The transducers are mounted within a driver housing and drive a driver post which is made from a thermally expansive material. As the backing plate is deformed to drive the mirror post to axially deflect the mirror membrane, the central driver post passively expands in response to temperature changes. In this manner, the transducers and thermally expansive mirror post act in conjunction to both actively and passively drive the mirror post over the full dynamic range of multioscillator or other ring laser gyroscope.

Ring laser gyro dither stripper

Abstract: A dither stripper for laser gyro dither including a digital microcomputer which controls the stripping of the dither signal from the inertial navigation signal of the laser gyro. The dither stripper schedules internal A/D conversions using an A/D conversion arbitration scheme as well as calculates the expected system sample clock. Accurate dither stripping is achieved using a phase locked loop feedback system which compensates for real time changes in dither pickoff components while incorporating an accurate gain control mechanism.

Ring resonator in a Sagnac loop

Abstract: A study of a ring resonator in a Sagnac loop is presented. The results of a theoretical analysis based on Jones calculus are confirmed by experiments. Comparison of a ring resonator in a Sagnac loop with a ring only is performed, and the advantages of our scheme are pointed out. The scheme can be used to increase the measurement sensitivity to small birefringence and associated polarization mode dispersion and to decrease the threshold for Sagnac-loop-based nonlinear switching and laser mode locking.