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MEDICAL AESTHETICS · TECHNICAL GLOSSARY
Q-switching uses an optical gate (electro-optic crystal or passive saturable absorber) to release the resonator’s stored energy within nanoseconds, producing extremely high peak power in a short pulse. This is the technology that gave lasers the peak intensity needed to fracture pigment particles — the historical entry point of lasers into pigment therapy.
Nanosecond pulses fracture particles via thermal expansion and shock waves; fragments are cleared by macrophages and the lymphatic system over weeks to months. Compared with picosecond pulses, nanosecond pulses carry more heat, slightly more collateral thermal effect, and usually need more sessions for the same target.
Picosecond systems cost more, but Q-switched lasers are mature, inexpensive to maintain, and still highly effective for black and red targets — the mainstay for budget-sensitive clinics and basic pigment work. LEIJEX’s dual-wavelength platform offers 532/1064 nm switching plus carbon-peel modes.
Post-inflammatory hyperpigmentation is common in darker skin and usually fades over months. Strict sun protection, repair topicals, and low-fluence picosecond adjuncts are common management paths.
Budget-conscious work on black/red targets suits Q-switched; fewer sessions, colored tattoos or texture improvement favor picosecond. The two are complementary and often co-exist in clinics.
LEIJEX BUYER CONTEXT
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