Q-switching is a technique for generating high-intensity, short laser pulses, as opposed to a continuous wave (CW) output. The "frequency" in a Q-switched laser refers to the pulse repetition rate, which is how many pulses are emitted per second (Hz).
This frequency (f) is the reciprocal of the time period (T) between pulses (f = 1/T). Therefore, a higher frequency corresponds to a shorter time between pulses.
In applications like laser marking, a higher frequency can create smoother lines and increase processing speed. However, there is a trade-off: increasing the frequency reduces the energy storage time between pulses, which generally results in lower pulse energy and lower peak power.