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.

G-LAS a ring laser goniometer for angular metrology

Abstract: Accurate measurement of angles down to the nanoradian level is required in precision mechanical industry, as well in geodesy, astronomy and experimental physics. G-LAS (GyroLaser Angular Standard) is the new transportable prototype of goniometer, based on a ring laser gyroscope mounted on a precision turntable, that is presently under test in a collaboration between INRIM and INFN. The target is to achieve an accuracy of the order of 10 nrad, being the accuracy of the most precise existing angular encoders at the level of some 100 nrad.

Fiber optic system and method for reducing bias errors in such a fiber optic system

Abstract: The bias error in a fiber optic system comprising a fiber optic gyroscope can be determined by determining of at least two different values for rotation rate by an evaluation unit of the fiber optic gyroscope for almost constant rotation rate applied to the fiber optic gyroscope and/or can be reduced by a linear combination of the at least two different values for the rotation rate. A fiber optic system that is suitable for carrying out this method comprises besides the fiber optic gyroscope a control device that is configured to control at least one element of the fiber optic gyroscope such that at least two different values for the rotation rate are determined by the evaluation unit of the fiber optic gyroscope for almost constant rotation rate applied to the fiber optic gyroscope.

Ring laser gyroscope with integrated polarization

Abstract: A ring laser gyroscope comprises a laser block that defines an optical closed loop pathway configured to contain a lasing gas. A plurality of mirror structures are respectively mounted on the laser block, with each of the mirror structures having a respective reflective surface that is in optical communication with the optical closed loop pathway. A plurality of electrodes are coupled to the laser block, with the electrodes configured to generate a pair of counter-propagating laser beams from the lasing gas in the optical closed loop pathway. At least one optical sensor is coupled to one of the mirror structures, with the optical sensor in optical communication with the closed loop pathway. A polarizer is in optical communication with the optical sensor. The polarizer is configured to pass laser light having substantially one polarization mode to the optical sensor.