经有限口径均匀加宽放大介质后基模高斯光束的M_Q^2因子变化  

Change of M_Q￣2 of a TEM_00 Gaussian Beam After Homogeneously Saturating Amplification

作　　者：华仁忠[1] 梁培辉[1] 丘悦[1] 

机构地区：[1]中国科学院上海光学精密机械研究所

出　　处：《光学学报》1995年第3期276-280,共5页Acta Optica Sinica

摘　　要：数值计算了基模高斯光束经有限口径的均匀加宽放大介质后，其Ｍ２Ｑ因于随输入光与放大器各参数的变化的规律。计算表明：激光放大均使光束质量变坏，且集中在放大器口径ａ与高斯光束的ω的比值处在１～４之间时；低的输入光强，小的放大器总增益，和大的饱和光强有利于保持放大器输出光的光束质量。Numerical simulating the change of M2Q of a TEMoo Gaussian beam after homogeneously saturating amplification versus parameters of the input beam and the amplifier was performed. Calculation shows that, laser amplification always deteriorates the input beam quality, especially when the ratio of the amplifier bore diameter a to the spot size ω of the Gaussian beam ranges about 1～ 4. To get an amplified laser beam with better beam quality, low input intensity, low total gain and large saturation intensity of theamplifier is prefered.

关 键 词：N^2Q因子 高斯光束 均匀加宽放大 介质 有限口径 

分 类 号：O43[机械工程—光学工程]