In December 2005 a heavy ion beam pumped UV excimer laser has been successfully demonstrated for the first time in the experiments performed at the GSI-SISHHT target area [1,2]. The primary goal for this experiment was to demonstrate laser effect on the KrF line (λ = 248 nm) and to proof this using various methods. The dependence of spontaneous and stimulated emission from pressure and composit...

BACKGROUND Transmyocardial laser revascularization (TMR) is an emerging treatment for end-stage coronary artery disease. A variety of lasers are currently available to perform the procedure, although their relative efficacy is unknown. The purpose of this study was to compare changes in myocardial blood flow and function 6 months after TMR with holmium:yttrium-aluminum-garnet (holmium:YAG), car...

There is a long history of corneal refractive surgery. Leonardo Da Vinci in 1508 said the theory of refractive errors. The first systematic analysis of the nature and results of refractive errors came from Francis Cornelius Donders. His classic treatise, “On the anomalies of accommodation and refraction of the eye”, outlined the fundamental principles of physiological optics. Ironically, in thi...

The correction of presbyopia with excimer laser surgery on the cornea is the ultimate goal for this type of surgery, since all other treatments for refractive defects have been successfully developed and implemented. Surgery with excimer laser is safe and extremely effective with today’s standards; therefore, most manufacturer companies are working and devoting great research funds and efforts ...

PURPOSE To report two cases of herpes simplex keratitis following excimer laser application. METHODS Two immunocompetent patients with no history of ocular viral infection developed ulcers after LASIK and phototherapeutic keratectomy (PTK), respectively. RESULTS Antiviral treatment was administered, and the lesions healed within 14 days. CONCLUSIONS These two cases suggest that herpes sim...

This paper describes an optical approach to verify the geometric accuracy of object surfaces structured by an excimer laser. Due to the restricted space in the excimer laser system a passive optical approach is chosen to be integrated in the system. Different optical techniques are compared. Their advantages and disadvantages for the use of integrating them in a laser system are discussed in th...

The gain characteristics of a discharge-pumped ArF excimer amplifier are measured with ~700-fs-long pulses. The small-signal gain and saturation energy are found to be 0.17 cm(-1) and 3.65 +/- 0.15 mJ/cm(2), respectively. The maximum output energy density extracted from the deeply saturated amplifier is as much as 10 mJ/cm(2). The demonstrated femtosecond gain characteristics of ArF indicate th...