A LASIK vision correction system uses a laser that emits 10ns long pulses of light, each with 2.5 J of energy. The laser is focused to a 0.90 mm -diameter circle.
What Is The Electric Field Strength Of The Laser Light At The Focus Point?
January 29, 2010 By 1 Comment
Intensity I(peak) = energy/(area*time) = 9.82438E13 W/m^2
E = sqrt(I(peak)*Z0) = 192383516.88676 V/m
(where free-space impedance Z0 = sqrt(µ0/e0) = 376.730313462204 ohms)