环激光中Langmuir流效应的理论分析

气体增益介质的流动是激光陀螺中的一项主要误差源.本文定量地讨论了在增益介质中激活原子和非激活原子的流动所带来的反向行波频差漂移.给出了在三阶理论下的Langmuir流的理论公式及计算值.本文重点在于用统计的方法处理了高斯光束通过增益场和流速场时的频差漂移.并给出各种情况下的计算公式.

A theoretical analysis on Langmuir flow effects in the ring laser

The gas flow in the gain medium is one of the main error sources in ring laser gyros. In this paper, a, quantitative discussion has been given on the beat frequency shift of oppositely directed traveling waves (ODTW) due to the flow of active and non-active atoms in the gain medium.By employing the third-order theory, the theoretical formulae and some numerical results of Langmuir flow are presented. In particular, a statistical approach has been utilized to handle with the beat frequency shift problem when a Gaussian beam passes the gain field and the flow velocity field, and calculation formulae have been derived for all possible cases.