Four-frequency Zeeman laser gyro’s counterpropagating waves signals processing methods

This work was carried out for Zeeman four-frequency laser gyro's accuracy increasing. In order to obtain beat signals from two pairs of generated waves the laser gyro is complemented with an optical radiation mixer, which distributes the orthogonal circular polarizations waves rays to different photodetectors. The orthogonal circular polarizations waves magnetic sensitivities difference is taken into account to increase the accuracy of a four-frequency laser gyro. Measurement error's magnetic component compensating method is proposed.