A second problem is thermal noise, especially that caused by the laser beam itself: the laser spots hit the center of the mirrors, heating them unevenly and thereby deforming them.

• 干涉仪的第二个问题是热杂讯，其中以来自雷射光本身的热最是严重；雷射光点打在镜子中心使之温度上升，加热不均匀的结果，会导致镜面变形。