Laser Fundamentals
Spot Size at Distance z
Beam radius at a distance z from the waist.
w(z) = w₀ · √[1 + (z/zR)²]
Fill the inputs from a real part
Every number is read from that part's datasheet entry: peak power and pulse energy as rated, pulse width at the part's rated maximum.
Solve for
Inputs
Result
Live diagram
Drawn from the values above, redrawn as you type - the same physical schematic the mini-program shows.