Miniaturized passively Q-switched Nd:YAG/Cr(4+):YAG lasers are promising candidates as spark sources for sophisticated laser ignition. The influence of the complex spatial-temporal pulse profile of such lasers on the process of plasma breakdown and on the energy transfer is studied. The developed measurement technique is applied to an open ignition system as well as to prototypes of laser spark...

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...

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 Striae distensae or stretch marks are atrophic linear dermal scars with epidermal atrophy. There are many therapeutic options for management, but no consistently effective modality is available yet. OBJECTIVE We compared the efficacy of 1064 nm long pulse (LP) Nd: YAG laser and 2940 nm variable square pulse (VSP) erbium: YAG laser in the treatment of striae distensae. METHODS Twe...

High-quality micro-lasers are key ingredients in non-linear optics, communication, sensing and low-threshold solar-pumped lasers. However, such micro-lasers exhibit negligible absorption of free-space broadband pump light. Recently, this limitation was lifted by cascade energy transfer, in which the absorption and quality factor are modulated with wavelength, enabling non-resonant pumping of hi...

Background and Aim: Nowadays, lasers are the focus of attention as a new treatment in dentistry. One applications is their use implant The present study aimed to compare effect YAG: Er 089 nm Diode laser irradiation on attachment osteoblast cells surface dental felxtures. Materials Methods: In study, 36 titanium implants were divided into three groups 12. Twelve irradiated with Er: YAG 12 diode...