Abstract: A fractional handpiece and systems thereof for skin treatment include a passively Q-switched laser assembly operatively connected to a pump laser source to receive a pump laser beam having a first wavelength and a beam-splitting assembly operable to scan a solid beam emitted by the passively Q-switched laser assembly and form an array of micro-beams across a segment of skin. The passively Q-switched laser assembly generates a sub-nanosecond pulsed laser beam having a second wavelength. The fractional handpiece may also incorporate a wavelength switching assembly, enabling selective delivery of both the second and third wavelengths, while providing control over the energy output at each wavelength, all within a single handpiece. The passively Q-switched laser assembly has an unstable cavity operation.

Abstract: A fractional handpiece and systems thereof for skin treatment including a handpiece body including a passively Q-switched laser assembly within the handpiece body operatively connected to a pump laser source to receive a pump laser beam having a first wavelength and a beam scanning system operable to scan a solid beam emitted by the passively Q-switched laser assembly and form a line of micro-beams across a segment of skin. The passively Q-switched laser assembly generates a high-power sub-nanosecond pulsed laser beam having a second wavelength. The pump laser source is a diode laser which emits the first wavelength at about 500 nm to about 1000 nm.