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Sum over the projection of the triangular subareas onto the axis of rotation define the effective ring laser normal (a). The diagram shown in (b) represents the observed laser beam wander in horizontal and vertical direction over a measurement sequence of several days.
Time series of the Sagnac beat frequency caused by Earth rotation and monitored with the UG2 gyroscope. The raw data are shown in (a), while the improvement with applied geometric scale factor corrections are given in (b). Finally the reduction of the gain medium contributions reduce the drift as shown in (c).
Summary of physical properties of a number of large ring lasers.
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