Caprara A, Reali G C
Opt Lett. 1992 Mar 15;17(6):414-6. doi: 10.1364/ol.17.000414.
Time-resolved M(2) numerical computation and experimental measurements of nanosecond pulses from a Q-switched variable-reflectivity-mirror Nd:YAG laser are presented for the first time to our knowledge. The beam quality parameter is seen to vary approximately from 1 at the beginning to 2 at the end of a high-energy pulse, with a value of 1.35 at the peak of the pulse, which also corresponds to the M(2) obtained from the time-averaged detection of the pulse profile.
据我们所知，首次给出了调Q可变反射率镜Nd:YAG激光器纳秒脉冲的时间分辨M(2)数值计算和实验测量结果。可以看到，在一个高能脉冲期间，光束质量参数大约从开始时的1变化到结束时的2，在脉冲峰值处的值为1.35，这也与从脉冲轮廓的时间平均检测获得的M(2)值相对应。
