The operational principle of frequency combs is that you generate very short pulses (in time domain), and that in the frequency domain (due to Fourier's transform) the spectrum of such pulses is a comb.
But this is just maths. And how it works from the physics perspective? Let's say I have a monochromatic continuous laser pointer that outputs only ONE wavelength. In front of the pointer I place a shutter that chops the beam into short pulses.
How can those pulses have multiple optical frequencies (with many different wavelengths)?
Or is my idea too simplistic and I'm forgetting something?
