What is the difference between a modulated CW laser and pulsed laser?

A modulated continuous-wave (CW) laser emits a constant beam that is electronically switched on and off. A true pulsed laser delivers short, high-intensity bursts of energy. In laser cleaning, pulsed lasers are generally safer for the base material because they concentrate energy in brief pulses, reducing heat buildup and the risk of damage. CW lasers, by contrast, can overheat and harm the surface if not carefully managed.