Yag is the only laser that has the ability to successfully remove or minimize dark and bright tattoos with out the side effect of scarring. Yag laser toning offered superior results in the treatment of melasma in the japanese skin type compared with the qswitched ruby laser, both ultrastructurally with less immediately posttreatment cellular damage and macroscopically, and a longer recurrencefree interval. Selection of our books indexed in the book citation index. Ylf lasers output from uv 262 nm 266 nm 355 nm ultraviolet, visible to near infrared 1580nm. Treatment of melasma with a qswitched 1064nm laser. A safe and effective option article pdf available in journal of cosmetic and laser therapy 176. Pdf we present a laboratory experiment for advanced undergraduate or graduate laserrelated. In summary, we demonstrated a vortex and actively qswitched nd. We demonstrated a compact gainswitched electrooptical qswitched 1064 nm nd. Yag laser has a wavelength of 1064 nm and has the capability to reach deeper layers of skin tissue than other types of lasers. Q switched lasers an overview sciencedirect topics. Qswitched laser and pulsed laser, diode pumped compact qswitched pulsed nd. Yag laser with a coherence length corresponding to pulse length. J pulse energy and 125 ns pulse duration at 1khz repetition rate, and its slope efficiency was about 30%.
Such applications are outside the scope of this book, but the technique does. Yag lasers are also employed to make subsurface markings in transparent materials such as glass or acrylic glass. Yag produces 2 wavelengths, one in the infrared range 1064 nm and the second beam of 532 nm wavelength which is useful for superficial skin lesions. Yag qswitched laser for the treatment of a hemicorporal epidermal nevus. This hyperpigmentation condition affects millions of people worldwide, the majority of whom are women. Lasers of up to 2 kw are used for selective laser melting of metals in additive layered manufacturing. Intra cavity second harmonic generation with qswitched laser. Melasma is a pigmentary disorder that is character ized by poorly defined, dark brown macules on sun exposed areas, such as the face, back, and arms. For automotive applications cutting and welding steel the power levels are typically 15 kw. Yag laser has been used most commonly for this application. Yag green laser with qswitch and mode locking find, read and cite all the. When pulsed over the area of ink the amount of energy this laser produces, short bursts of high energy, the ink particles shatter and are then absorbed by the body. Super alloy drilling for gas turbine parts typically uses pulsed nd.
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