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对环形非稳腔激光器做数值计算模拟,给带有倒向波抑制(RWS)镜的环形非稳腔激光器的设计提供了数值参考。通过自洽方程,用Matlab计算带有倒向波抑制镜的环形非稳腔正、倒向波的稳定过程。改变腔长、放大率等参数来计算,发现使用倒向波抑制镜能明显提高正向波的输出,并能抑制倒向波。气体分子的多普勒频移导致正、倒向波的频率变化。频率分开的越小,竞争越大,抑制效果越好,正向波输出功率则有所下降。对于特定的结构,存在最佳的放大率,使正向波的输出最大。计算结果表明,倒向波抑制镜的引入能增大环形非稳腔输出功率。计算结果对实际环形非稳腔的设计十分有用。
The numerical simulation of a ring-shaped unstable cavity laser provides a numerical reference for the design of a ring-shaped unstable cavity laser with a backward wave suppression (RWS) mirror. Through the self-consistent equation, the stable process of the positive and the backward wave of the ring-shaped unstable cavity with backward-suppression mirror was calculated by Matlab. Change the length of the cavity, magnification and other parameters to calculate and found that the use of backward-suppression mirror can significantly improve the output of the forward wave, and can inhibit the backward wave. The Doppler shift of gas molecules leads to the change of the frequency of positive and negative waves. The smaller the frequency, the more competition, the better the suppression effect, the output power of the forward wave is decreased. For a particular structure, there is an optimum magnification that maximizes the output of the forward wave. The calculation results show that the introduction of the backward-wave suppression mirror can increase the output power of the annular unstable cavity. The calculation results are very useful for the design of the actual circular unstable cavity.