CO₂GDLにおいて光共振器のくぼみが小信号利得係数に与える影響

抄録

In the CO₂ gasdynamic laser (GDL), the mirrors, which make up the laser resonator, are usually set in the recesses of a duct to prevent damage or contamination of the mirrors. Consequently, a cavity is formed in the duct, and the gas flow is disturbed by the cavity. In this paper, two-dimensional numerical analysis which considered the cavity in the duct was carried out. From the numerical results and experimental data, the influence of the cavity on the small-signal gain was discussed. According to the numerical results, the small-signal gain decreases in the case which considered the cavity in the duct. This tendency was in good agreement with the experimental ones.