Influence of Q-factor value of optical resonator on spatial discharge structure and output characteristics of long pulse XeCl laser

摘要

Present paper reports the results of theoretical investigations of influence of Q-factor value of optical resonator on spatial properties and output characteristics of long pulse discharge pumped XeCl laser. It has been shown that high value of Q-factor do not influence homogeneity of discharge plasma. When the value of Q-factor is low an inhomogeneous distribution of intensity of laser photon flux occurs already at the beginning of generation. Photoionization of excited Xe atoms leads to an enhancement of electron density near the output mirror in comparison with the rest discharge volume. Further development of inhomogeneity is caused by instability of discharge plasma. Inhomogeneity of pumping discharge initiated by interaction between laser photon flux and discharge plasma leads to significant changes of characteristics of laser radiation.