What does the duty cycle refer to in pulsed laser emission?

The duty cycle in pulsed laser emission specifically refers to the duration of the pulse compared to its rest period. This concept is crucial in understanding how lasers deliver energy in a pulsed manner.

When a laser emits a pulse, it doesn't emit continuously; instead, it alternates between being on (emitting light) and off (not emitting light). The duty cycle provides a ratio or percentage of the time the laser is actually active compared to the total time it takes to complete one cycle (which includes both the pulse duration and the rest period). This measurement is essential for determining the average power output and the effect of the laser treatment on tissues.

By adjusting the duty cycle, practitioners can manipulate the intensity and thermal effects of the laser, tailoring treatments for various conditions effectively. Therefore, understanding the duty cycle plays a vital role in the application and efficacy of Class IV laser therapy.