Predicting gas decomposition in an industrialised pulsed CO2 laser

Influence of shielding gas composition on weld structure in pulsed Nd: YAG laser welding

This work studied the effect of additions of carbon dioxide to argon shielding gas on the weld shape and microstructure of ST14 steel in pulsed Nd: YAG laser welding. By additions of carbon dioxide up to 15%,the weld area and depth/width ratio decreases while rising of carbon dioxide up to 25% causes increasing of weld area and depth/width ratio. It is observed that the weld metal microstructur...

Influence of shielding gas composition on weld profile in pulsed Nd:YAG laser welding of low carbon steel

Weld area and weld depth/width ratio can be considered to be of the most important geometrical factors in pulsed laser welding. The effects of carbon dioxide and oxygen additions to the argon shielding gas on the weld properties in pulsed laser welding of low carbon steel is investigated. Presence of carbon dioxide and oxygen up to 10 and 15 percent respectively decreases the weld geometrical f...

Treatment of scars after aesthetic surgery utilizing of a combination of pulsed dye laser and fractional CO2 laser

Background and Aim: Undesirable appearance of the scar tissue after aesthetic surgery can affect the outcomes and patient satisfaction. In recent years, early laser therapy had been encouraged to reduce the scar tissue formation. However, the available evidence regarding the outcomes of laser therapy utilizing combined lasers are limited. In the current study, the effects of combined laser ther...

Study of Fibroblast Cells Behavior on the Acrylic Acid Co2 Pulsed Laser Grafted Silicone Elastomer for Tissue Engineering Application

A new type of CO2 laser avoids power density loss due to absorption and the blooming effect by the CO2 gas environment.

The aim of this study was to compare the acute tissue effects of a standard CO2 laser (Ultrapulse 5000) with a new design (Ultrapulse 5000L) that utilizes a different carbon isotope (C13) in the rat uterine horn model. Following laparotomy, measured laser injuries were effected with the Ultrapulse 5000 or Ultrapulse 5000L lasers via a laparoscope using CO2 or air for insufflation. Serial sectio...