SPAD Single-Photon Detection
PDE Spectral Curve
Gaussian model of photon detection efficiency against wavelength around the peak wavelength.
PDE(λ) = PDE_max · e^(−½((λ−λ₀)/σ)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.