CO_2ガス・ダイナミック・レーザーの研究

Abstract

This paper gives an analysis of the conventional CO_2 Gas Dynamic Laser laying emphasis on effects of stagnation tempreture, stagnation pressure and nozzle profile. The analysis includes 3-mode relaxation equations, and also photon generation equation in the optical cavity. It is shown that, the optimum value of stagnation tempreture exists in the range of 1700°∿1800°K, the out put power is nearly proportional to the stagnation pressure, and the higher the stagnation pressure, the more rapid expantion nozzle profile is needed. The paper gives also experimental results obtained through two different type shock tubes, one is a closed system shock tube with the quick openning valve and another is a conventional shock tube with a diaphragm.