Effect of frequency stabilization on beam shift of total reflection prism laser gyro

Abstract

For the phenomenon of degradation of the performance of total reflection prism laser gyro before and after reset jump, this paper investigates the effect of frequency stabilization on the beam shift of total reflection prism laser gyro using a matrix optics method, and proposes a method to calculate the beam shift with frequency stabilization. The numerical simulation and experimental results show that, unlike the beam shift characteristics caused by the prism temperature, the frequency stabilization additionally causes an approximately equal beam shift at each prism interface, and the shift is proportional to the frequency stabilization control amount. It is pointed out that the large abrupt change of beam propagation path before and after reset jump is the main reason for the degradation of total reflection prism laser gyro performance, and the frequency stabilization control method of reset jump once for each optical wavelength adjustment can effectively reduce the beam shift caused by frequency stabilization.