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定义了适用于多模固体激光器的光束质量参量，理论和实验结果表明，定义的光束参量的变换遵循ＡＢＣＤ 法则，通过成像系统后保持不变。
The beam quality parameters suitable for multimode solid state lasers are defined. The theoretical and experimental results show that the transformation of the defined beam parameters follows the ABCD rule and remains unchanged after passing through the imaging system.