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The being advantages ofthe laser gyro against the precise gyro with rotating mass are the cost efficiency and the theoretical rapidity for practical systems. There have been unavailable the relevant publications on the laser gyro's necessary precision providing and also on its rapidity and on the nonstationary systematic errors excluding in real time. on the other hand it is known that output frequency of continuous wave linear laser is establishing, even in stationary conditions, during the transition time of 20 minutes up to 3 hour for different laser types '. Thus most traditional measurements with continuous wave laser are used in stationary conditions, when the counting of output characteristics is begun after the necessary transition time is gone 2 Since the output ofring laser is proportional to the active media generation frequency, the laser gyro has the nonstationary systematic error with the same value of the transition time. The investigations have been performed would be derived in the two groups. There are the laser gyro error's "mathematical models" and so-called "dynamic compensation methods" discussed in . The "dynamic compensation methods" are based on using of the temperature-depending elements in feed back system of the output signal. The both methods require the lasting measurements of laser gyro output in the stationary conditions to define the coefficients of the error model or to determinate the characteristics ofthe temperature-depending elements. These measurements must be repeated or the parameters must be automatically tuned for any other case. So it is unreasonable. The plasma heat regime influence on the precise ring laser output is considered in this work following to The case of the heat influence on the plasma without the dimensions changing is supposed. The thin effects, as modes drag, mode competition and radiation trapping ,do not be considered in order to the more clear idea. The each component of laser active media (electron gas, ion gas, excited atoms, etc.) has its own optical properties and puts its deposit in the ring laser output instability The analysis resulted in shows that, in case of constant electron and ion concentrations and when the frequency of electron-ion collisions is comparatively low, one obtains the Fresnel drag effect with electro-neutral atoms only.
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