A mains electricity (AC-powered) device assembly in which input energy (e.g., flashlamp, diode laser) is used to excite a glass/crystal rod, or a fibre doped with a glass/crystal element (known as fibre laser), to emit a high-power laser beam intended to incise, excise, ablate, and vaporize soft tissues for dermatological applications such as skin resurfacing, acne treatment, and/or lesion/hair/tattoo removal; some types may also be used for coagulation/haemostasis procedures. It typically includes a light source, laser beam delivery/positioning device(s), user interface, and controls/foot-switch; it does not include frequency-doubling technology.