Beam divergence studies on a long pulse XeC1 excimer
نویسنده
چکیده
The focusability of a long l)ulse XeCI excimer laser has been improved using confocal positive branch unstable resonators where the outcoupling is done through the convex mirror. For the outcoupler different reflectivity profiles are used. A near diffraction limited output beam is obtained from hard edge unstable resonators. A beam with only one central s1)ot in the focus of a lens can be obtained with a resonator fitted with a Gaussian outcoupling mirror.
منابع مشابه
Excimer Lasers in Medicine
Introduction Excimer lasers emit light energy, short optical pulses at ultraviolet wavelengths, that results in a unique laser tissue interaction. This has led to an increasing number of studies into medical applications of these lasers in fields such as ophthalmology, urology, cardiology and neurology. The typical excimer laser is operated with a combination of a halogen (fluorine or chlorine)...
متن کاملOptimisation of the pulse duration of a discharge-pumped XeF( <Emphasis Type="Italic">BX </Emphasis>) excimer laser
In an x-ray preionised XeF(B~X) dischargeexcited laser driven by a magnetic-spiker sustainer circuit with a magnetic pulse compressor the influence of the various parameters on the optical pulse duration was experimentally investigated. Laser pulses at 2= 351 nm with a duration of 212 ns (FWHM) have been achieved in a NF3/Xe/Ne mixture by using very low (0.25 mbar) NF3 partial pressures in a to...
متن کاملCharacterization of an Ultrahigh Peak Power XeF ( C + A ) Excimer Laser System
The gain characteristics of an electron-beam pumped XeF(C -+ A ) excimer amplifier operating in the bluegreen spectral region were investigated for several laser pulse lengths. Saturation energy densities of 50 and 80 mJ/cm2 were measured for injected laser pulse durations of 250 fs and 100 ps, respectively. A gain bandwidth of 60 nm was observed with 100 ps pulse injection. Using an optimized ...
متن کاملMeasurements of detector nonlinearity at 193 nm.
We have developed a measurement system based on a correlation method to characterize the nonlinearity of a detector's response over a large range of laser pulse energy. The system consists of an excimer-laser source, beam-shaping optics, a beam splitter, a monitor detector, a set of optical filters, and the detector under test. Detector nonlinearities as large as 10% or greater over an entire m...
متن کاملThe influence of charge-mode operation of a XeCl laser on the beam profile
The shape of the beam profile of a discharge excited XeCl excimer laser using a spiker-sustainer electrical circuit has been varied from a ‘bell’-, through a ‘top-hat’-, to a ‘camel-back’-profile by varying the delay between the spiker pulse and the maincurrent with the circuit operating in the charge-mode. Fine-tuning of the beam profile can be done by varying the charging voltage of the main ...
متن کامل