Single-crystal fibers are an intermediate between laser crystals and doped glass fibers. They have the advantages of both guiding laser light and matching the efficiencies found in bulk crystals, which is making them ideal candidates for high-power laser and fiber laser applications. This work focuses on the growth of a flexible fiber with a core of dopant (Er, Nd, Yb, etc.) and a polycrystalli...

Neuroendoscopy is presently considered a minimally invasive surgical approach. Comparatively, a microsurgical approach to ventricles allows using quickly several instruments and material for hemostasis, cutting and excision. Despite wonderful magnification recently improved, the bleeding control and tumor ablation are harmful by standard tools through the narrow channel of the neuroendoscope. S...

background and aims. the aim of this study was to compare shear bond strength (sbs) of metal and ceramic brackets bonded to enamel using acid versus er:yag laser etching. materials and methods. eighty premolars were divided into 4 groups: am (acid etching/ metal brackets), ac (acid etching/ ceramic brackets), lm (laser etching/ metal brackets) and lc (laser etching/ ceramic brackets). enamel co...

introduction: the use of laser for cavity preparation or conditioning of dentin and enamel surfaces as an alternative for dental tissue acid-etch have increased in recent years. the aim of this in vitro study was to compare microleakage at enamel-composite and dentincomposite interfaces following erbium-doped yttrium aluminum garnet(er:yag) laser conditioning or acid-etching of enamel and denti...

Passive Q switching of solid-state lasers is usually accomplished with organic dyes or color centers as the saturable absorber. Dyes, however, have poor thermal stability and tend to degrade rapidly. To operate in cw-pumped lasers, dyes require a circulation system. Color centers, such as the color-center LiF crystal, -3 exhibit a fading phenomenon that may limit the period of reliable operatio...

BACKGROUND Treatment of congenital melanocytic nevi (CMN) with intense pulsed light (IPL) has recently produced promising results. OBJECTIVE To evaluate the clinical and histological outcomes of small-to-medium sized CMN treated with IPL alone and in combination with erbium: yttrium-aluminum-garnet (Er: YAG) laser. METHODS We performed a retrospective chart review of 26 small-to-medium size...