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通过自洽方程,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。通过改变腔长、放大率等参数计算,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。当正、倒向波的频率重合时,竞争最大,抑制效果最好,正向波输出功率有所下降。对于特定的结构,存在最佳的放大率,使正向波的输出最大。通过 FFT 方法,可知环形输出功率增大,光束质量下降。计算所得的结果表明,抑制镜的引入能增大输出功率,可根据结果选择合适的参数。
Through the self-consistent equations, the stability of the forward and backward waves of the ring-shaped unstable cavity with backward-suppressing mirror was calculated. By changing the cavity length, magnification and other parameters, it is found that the use of the backward-wave suppression mirror can obviously improve the output of the forward wave and can restrain the backward wave. When the forward and backward wave frequency coincide, the competition is the maximum, the suppression effect is the best, and 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. Through the FFT method, we can see the ring output power increases, the beam quality decline. The calculated results show that the suppression of the introduction of mirrors can increase the output power, according to the results to choose the appropriate parameters.