On the calculation of the gyro-factor in a semiconductor ring laser

The frequency splitting due to the Sagnac effect is considered in the active laser gyro with a ring cavity filled with a medium having the high refraction index and nonzero dispersion. It is shown that the medium reduces the gyro-factor by n* times, where n* is the group refractive index. However, in the case of dynamic anomalous dispersion, it is possible in principle to increase the gyro-factor without increasing the ring cavity size.