Based on theory of light 2 × 2 transmission matrix

characteristic parameters and electric field vector equation of Gaussian beams in general ring cavity of four frequency differential laser gyro are established mechanism of light wave transmission in 8 ring empty and quartz crystal cavity is further discussed

on this basis

including propagation a circle

the Gaussian beams maximum light intensity

light spot radius size and light intensity space distribution by beam waist place and general position as a starting location. The results show that light waves transmit a circle can obtain maximum light intensity 7. 9837 × 106

the smallest light spot radius0. 353 9 mm on the cross section when the beam waist position O1as a starting location for the whole quartz crystal cavity

therefore

this place is the best installation location of active medium.