Femto-Photography: Visualizing Photons in Motion at a Trillion Frames per Second

Am I wrong, or is this technique just a very advanced stroboscopy. Even though it may appear we are following the same pulse of light, that's not what is happening.

It is not one shot of light traveling, but every frame is created with a different pulse of laser captured at the right moment.

What I wonder is how did they figure out ways to capture such short exposure. That is the technological achievement making this happen.