Flux-based Two-Photon Emission Calculation Formula Photon Flux Phi Calculation Phi = P / (Ep x A) where P = average laser power (Watt) Ep = energy per photon (Joule) A = beam spot area (square meters) Photon Energy Ep Calculation Ep = (h x c) / lambda where h = Planck constant (6.626 x 10^-34 Joule·second) c = speed of light (3.0 x 10^8 meters/second) lambda = laser wavelength (meters) Unit…