The pursuit of 4000W ultra-high power in aesthetic hair removal is fundamentally aimed at maintaining large-spot sliding coverage while simultaneously achieving "ultra-narrow pulse widths (≤30ms) combined with high energy," so that hair follicles are destroyed instantaneously without burning the epidermis. However, the industry today relies overwhelmingly on stacking 30–40 pieces of 50W and 100W laser bars to reach high power, which directly results in handpiece net weights approaching 1 kg, excessive microchannel water resistance, and uncontrolled wavelength thermal drift. Meanwhile, the 200W bars available on the market suffer from frequent thermal stress and optical damage (COMD) and insufficient stability, making a substantive breakthrough at the level of the underlying high-power chip an urgent necessity.
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