laser forming is a modern process which is mainly used for forming metals. different lasers are used in this regard that includes nd: yag and co2. in this study, forming bi-layer sheets of aluminum/ceramic by laser was investigated. furthermore, effect of uniform and gaussian heat flux distribution in different power, velocity, and beam diameters on bending angle was studied. fem simulation ind...

The construction of a high-pressure (up to 20 atm) transversely excited CO2 laser using transverse X-ray preionization is described. High pressure operation was found to be greatly improved in comparison to UV-preionized systems. Homogeneous discharges have been achieved in the pressure range 5-20 atm, yielding a specific laser output in the order of 35 J/1. PACS: 42.55E, 42.60B Generation and ...

The formation of linear hypertrophic scars along suture lines is a frequent and undesired event after the conventional thy-roidectomy. 1 Previous reports have described good therapeutic results in minimizing the scars with fractional lasers and intralesional steroid injections. 1-4 However, in the cases of narrow linear scars, the fractional laser can damage the surrounding tissue despite using...

BACKGROUND The widespread use of surgical lasers has found place in dermatologic and aesthetic surgery largely because they are well tolerated with a reduced incidence of postoperative haemorrhage and oedema, few associated adverse events and a high rate of patient satisfaction. PATIENTS AND METHODS A retrospective analysis of 1232 consecutive patients was performed on patients undergoing a r...

We propose a new method for precisely fabricating lensed fiber with desired focal length by first cleaving coreless silica using an ultrafast femtosecond laser without thermal effects and subsequently shaping the radius of curvature at optical-fiber end CO2 laser. The cleaved segment obtained is attached to long single-mode fiber. beam-exposure time power are adjusted melt coreless-fiber yield ...

Furnas volcano, in São Miguel island (Azores), being the surface expression of rising hydrothermal steam, is the site of intense carbon dioxide (CO2) release by diffuse degassing and fumaroles. While the diffusive CO2 output has long (since the early 1990s) been characterized by soil CO2 surveys, no information is presently available on the fumarolic CO2 output. Here, we performed (in August 20...

INTRODUCTION Benign neoplasms and hyperplastic tumorous lesions are common oral pathologies. These lesions require to be surgically removed by conventional surgery, laser, or electrosurgery. Surgical treatment aims at complete removal of pathological lesions and ensuring proper healing of the tissues to minimize the risk of lesion recurrence. AIM To present possible applications of Er:YAG and...