A hybrid with small average power CO2 laser is presented. The laser might operate both in a continuous regime and in a pulsed one. The advantages of the good optical quality beam of a longitudinal discharge laser and of a high power peak pulse are simultaneously achieved. A high voltage capacitor which is switched on by means of a rotary spark gap sustains the pulsed regime. The commutation between the two regimes might be easily done and a hybrid operation is also obtainable. Glass surface treatment using this laser was performed. Fine polishment of the irradiated surface was achieved. The fine structure of the surfaces which were irradiated have been studied using atomic force microscopy.