The affection of the noise of the detecting system to the width measurement of laser beam is discussed,and the methods for reducing the nosie affection in practical system designation are presented.

• 讨论了由于探测系统噪声的存在，对目前广泛采用的二阶矩束宽定义的激光束空域参数测量系统的影响，并给出实际测量系统设计时减少噪声影响的方法。