Abstract
Results of experimental investigations into the possibility of a pulsed inductive cylindrical discharge as a new method of pumping gas lasers operating at different transitions of atoms and molecules with different mechanisms of formation of inversion population are presented. The excitation systems of a pulsed inductive cylindrical discharge (pulsed inductively coupled plasma) in the gases are developed and experimentally investigated. For the first time five pulsed inductive lasers on the different transitions of atoms and molecules are created. Characteristic feature of the emission of pulsed inductive lasers is ring-shaped laser beam with low divergence and pulse-to-pulse instability is within 1%.
Highlights
The RF induction excitation of continuous-wave lasing was reported in [1,2,3]
In our first experiments to demonstrate the possibility of the creation of the pulsed inductive gas laser, we chose transitions in neutral fluorine atoms which works by the excitation of the pulsed cylindrical inductive discharge in a He:F2(NF3) mixture, because the population inversion in these transitions is reached at comparatively low excitation levels in a wide pressure range [9,10,11,12,13]
In this work the developed laser on the electron excited transition of Fluorine (FI) atoms pumped by a pulsed inductive cylindrical discharge is described
Summary
The RF induction excitation of continuous-wave lasing was reported in [1,2,3]. Continuous-wave lasing on transitions in atomic argon ions in the green spectral range under excitation by a longitudinal inductive RF discharge was obtained in [1,2]. An appropriate choice of the tube material may ensure the purity of the active medium and considerable endurance of lasers The formation of such a discharge is not accompanied by the appearance of cathode spots on the surface of the electrodes, which are responsible for the instability and contraction of the discharge, deterioration of the homogeneity of the discharge, contamination of the gas mixture, quenching of lasing, and limitation of the pulse repetition rate. The application of the pulsed inductive discharge for excitation is a promising method for pumping gas lasers, and metal vapor and solid state lasers This method can be used to produce the plasma for obtaining radiation (including induced radiation) in any spectral range, especially that extending from 100 nm to THz, which is of considerable interest for microelectronics, photolithography and biomedicine
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