Abstract
The emission characteristics of an ultraviolet-visible pulsed multi-ionic xenon laser were studied through time-resolved spectroscopy and the results were interpreted using a collisional-radiative theoretical model. This analysis includes more than 20 laser lines belonging to several ionic species (Xe III-VIII). Depending on the experimental conditions, different temporal distributions of the laser lines and their corresponding spontaneous emissions can be observed. In particular, laser emission presents temporal oscillations near threshold. Pumping processes for the laser transitions have been analyzed by using this model. Relativistic Hartree-Fock calculations of laser level lifetimes and radiative transition probabilities were performed. Experimental laser gain for several transitions were obtained and compared with the theoretical values derived from the calculations.
Highlights
The emission characteristics of an ultraviolet-visible pulsed multi-ionic xenon laser were studied through time-resolved spectroscopy and the results were interpreted using a collisionalradiative theoretical model
M ost o f the unresolved laser lines were attributed to Xe V [11], Xe VII [12], and Xe VIII [13]
We perform ed laser gain analyses for several lines by using level param eters obtained from relativistic H artree-Fock calculations; these results are compared with the corresponding experimental values
Summary
SIN C E THE advent o f the laser, capillary discharges have been used to produce laser action in the ultraviolet (UV), visible, and infrared (IR) range [l]-[4 ]. Lowpressure xenon plasma excited by pulsed high-current-highvoltage electrical discharges produces high-gain laser transitions in the near U V and visible range. This laser output has been used for pumping dye lasers [5]-[7] and for studying injection-locking phenom ena in CW dye lasers [8 ], [9]. Follow ing another line o f research, Papayoanou et al [14] reported on the parametrization o f a xenon plasma laser including observations about the tem poral distribution o f the output. We perform ed laser gain analyses for several lines by using level param eters (lifetimes and radiative transition rates) obtained from relativistic H artree-Fock calculations; these results are compared with the corresponding experimental values
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