This study was carried out to investigate the influence of low-intensity polarized visible laser radiation on the acceleration of skin wound healing. Background Data: Low-level laser therapy (LLLT) at adequate wavelength, intensity, and dose can accelerate tissue repair. However, there is still unclear information about light characteristics, such as coherence and polarization. Some studies indicate […]
Results of fractional ablative facial skin resurfacing with the erbium:yttrium-aluminium-garnet laser 1 week and 2 months after one single treatment in 30 patients
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The erbium:yttrium-aluminium-garnet (Er:YAG) laser has recently been used in the fractional resurfacing of photo-aged skin. Our study evaluated the results after one single session of fractional resurfacing with Er:YAG. Thirty women participated in the study, with an average age of 46 years, skin types from II to IV, and wrinkle grades I to III. The […]
Instabilities of Short-Pulse laser Propagation through Plasma Channels
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The stability of short laser pulses propagating through plasma channels is investigated theoretically.Perturbation to the laser pulse are shown to modify the ponderomotive pressure, which distors the dielectric properties of the plasma channel. The channel perturbation then further distors the laser pulse. A set of coupled mode equation is derived and a matrix dispersion relation […]
Computer Simulations of Laser Ablation of Molecular Substrates
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Laser ablation of molecular systems constitutes a basis for a diverse range of well-established applications, from matrix assisted laser desorption/ionization (MALDI) and other laser-driven techniques for mass spectrometric analysis of large nonvolatile biomolecules1-3 to laser surgery4 and to surface microfabrication and pulsed laser deposition (PLD) of organic films and coatings. Emerging applications of laser ablation […]
Safe and Effective One-Session Fractional Skin Resurfacing Using a Carbon Dioxide Laser Device in Super-Pulse Mode: A Clinical and Histologic Study
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Carbon dioxide (CO2) laser ablative fractional resurfacing produces skin damage, with removal of the epidermis and variable portions of the dermis as well as associated residual heating, resulting in new collagen formation and skin tightening. The nonresurfaced epidermis helps tissue to heal rapidly, with short-term postoperative erythema. The results for 40 patients (8 men and […]
One-Session Skin Resurfacing frazionale sicura ed efficace utilizzando un dispositivo laser ad anidride carbonica in Super-Pulse Mode: uno studio clinico e istologico
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Carbon dioxide (CO2) laser ablative fractional resurfacing produces skin damage, with removal of the epidermis and variable portions of the dermis as well as associated residual heating, resulting in new collagen formation and skin tightening. The nonresurfaced epidermis helps tissue to heal rapidly, with short-term postoperative erythema. The results for 40 patients (8 men and […]
Neodymium concentration dependence of 0.94-, 1.06- and 1.34-μm laser emission and of heating effects under 809- and 885-nm diode laser pumping of Nd:YAG
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Laser emission in the 0.94-, 1.06- and 1.34-micron ranges in diluted and concentrated Nd:YAG crystals longitudinally pumped by a 885-nm diode laser on the 4I9/2 → 4F3/2 transition is investigated. Continuous-wave operation at watt level in all these wavelength ranges is demonstrated with a 1.0-at.% Nd:YAG crystal; however, the laser performance is impeded by the […]
Propagazione della luce
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Vogliamo analizzare che cosa succede quando un fronte d’onda incontra sul suo cammino una superficie estesa. Dobbiamo distinguere i caso in cui la superficie sia una superficie dielettrica o conduttrice. Analizziamo innanzitutto il caso in cui la superficie separa il mezzi dielettrico in cui l’onda si propaga, da un secondo mezzo, ancora dielettrico, omogeneo e […]
Un nuovo uso del laser Erbio: YAG (2940 nm), per la fototermolisi frazionale ablativa nel trattamento della pelle del volto fotodanneggiata: uno studio pilota
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La fototermolisi frazionale è una nuova tecnica per il trattamento di lesioni della pelle in cui è indotta una serie di microscopiche ferite termiche (zone trattamento microscopici) per stimolare una risposta terapeutica in profondità nel derma. articolo completo Autori Moshe Lapidoth Marina Emiko Yagima Lilian Mayumi