有正支共焦非稳腔二氧化碳激光器的模场计算

Mode Calculations of CO_2 Lasers with Positive-Branch Confocal Unstable Resonator

本文利用快速傅立叶变换 (FFT)法 ,对有正支共焦非稳腔的二氧化碳激光器模场进行了计算 ,给出了在不同谐振腔 (放大倍数M =2 .5 (M =1.45 ) ,等效菲涅耳数Neq=1.5 (Neq=1.2 9) )下的模分布图 ,与类似的结果进行了比较 ,符合的较好 ,并分析了形成模分布的原因 。

In this paper, fast Fourier transform method(FFT) is used to calculate mode of CO 2 laser with positive-branch confocal unstable resonator. Mode distributions of different resonators are given. A good consistence is proved by a comparison of these results with the similar papers. At the same time, we analyze the reason of mode distributions and provide evidences for making the best of performance of CO 2 laser.