We have investigated the cryogenic performance of Yb:YAG and Yb:YLF crystals in rod-geometry to understand pros cons each material for development ultrafast lasers amplifier systems. performed detailed spectroscopic (absorption, emission, lifetime), temperature, lasing, thermal-lens measurements with under almost identical conditions. Our analysis has shown that despite higher thermal conductiv...

Starting from the optical properties of laser beams, the requirements of optical systems for manipulating laser radiation in industrial applications are derived. The relevant parameters, relations to the diffraction limit and the state-of-the-art design techniques are discussed. The three important types of lasers for use in industrial materials processing operate at wavelengths ranging from th...

Objectives The use of lasers for the treatment of periimplant hard and soft tissues is now refmore than ever before. Achieving bone integrity. The aim of this study is to evaluate the effects of Er:YAG, 980 nm and 810 nm diode lasers irradiation on biocompatibility of SLA titanium disks by SaOs2 cells morphology. Methods In this in-vitro study sixty sterile titanium disks with SLA surface were...

Purpose: This study aimed to evaluate the microleakage of glass ionomer restorations (GIC) in Class V cavities prepared with both conventional and Er: YAG laser techniques. Methods: Twenty teeth were used. Standard (4mm wide,3m high,3mm deep) on buccal lingual surfaces teeth. All randomly divided into four groups. In Groups II IV, by laser, I III conventionally a diamond bur. then restored GIC ...

Based on recently published spectroscopic measurements of the relevant energy-transfer parameters, we performed a detailed analysis of the population mechanisms and the characteristics of the output from Er-singly-doped and Er, Pr-codoped ZBLAN fiber lasers operating at 3 m, for various Er concentrations and pump powers. Whereas both approaches resulted in similar laser performance at Er concen...

Two standard commercial flashlamp-pumped Nd:YAG (YAG denotes yttrium aluminum garnet) lasers have been upgraded to "pulse-burst" capability. Each laser produces a burst of up to 15 2 J Q-switched pulses (1064 nm) at repetition rates of 1-12.5 kHz. Variable pulse-width drive (0.15-0.39 ms) of the flashlamps is accomplished by insulated gate bipolar transistor (IGBT) switching of electrolytic cap...

background and aims. the aim of the present study was to compare the effect of surface treatment with er; cr:yssg, nd:yag, and co2 lasers on repair shear bond strength of a silorane-based composite resin. materials and methods. sixty eight cylindrical samples of a silorane-based composite resin (filtek silorane) were prepared and randomly divided into 4 groups as follows: group 1: without surfa...