Suppose I am mathematically modeling a visible green laser pointer beam which starts from the ground and ends up a half mile or full mile in the sky, projected upon an aircraft window 2 inches thick. How much will the ground-borne visible green laser pointer beam spread out in the final 2 inches between the front and back pane of the aircraft window? Please compare this result with that for an incoherent visible light green beam originating from the ground.
The reason I ask this question is to solve one of society's problems where commercial aircraft are grounded due to laser pointers sent from the ground near airports?
I just read the following 2 Stack Overflow articles which discuss some of the physics and equations necessary to solve my question:Physics of Focusing a Laser