【摘要】 提出一种适合于高功率超音速横流氧碘化学激光器的环状输出的ＵＲ９０束转非稳腔，采用ＦＦＴ方法模拟了具有非均匀分布的小信号增益时最低阶模的光场强度分布。利用大口径铜蒸汽激光器，通过实验研究了在放大倍率为１．２１和１．１３的情况下，环状输出ＵＲ９０腔正向模与反向模的基本特性，得到较好的实验结果。更多还原

【Abstract】 A annular output unstable resonator with 90° beam rotation suitable for high-power supersonic chemical oxgen-iodine lasers (COIL) is given, intensity distribution of lowest-order mode with inhomogeneous distribution of small signal gain is calculated by FFT method. The properties of forward mode and reverse mode of this resonator at magnification M =1.21 and 1.3 are studied by copper vapor laser experiments, a good experimental result is obtained .更多还原