Fiber & Lasers
V-Number & Modes
Normalized frequency V of a fiber, and the single-mode versus multimode cutoff condition.
V = (2πa/λ) · NA
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.