J. Phys. Colloques
Volume 41, Numéro C9, Novembre 1980Third International Symposium on Gas-Flow and Chemical Lasers
|Page(s)||C9-167 - C9-173|
J. Phys. Colloques 41 (1980) C9-167-C9-173
THEORETICAL ANALYSIS OF 16-µm CO2GASDYNAMIC LASERS. Saito, K. Suzuki, M. Obara et T. Fujioka
Department of Electrical Engineering, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama-shi, 223, Japan.
The possibility of obtaining high-power 16-µm radiation from a conventional CO2 gasdynamic laser (GDL) has been evaluated theoretically by means of a modified Anderson's time-dependent method. In this simulation, the rate equations with the energy of the vibrational mode or the population of the each vibrational level are used. The analysis showed that the 16-µm pulse of 25µJ/pulse/cm3 extractable energy and 4.2 kW maximum power can be achieved on the P(15) line of the (0200)-(010) transition by injecting a fast 9.4-µm pulse at a position 15 cm downstream of the nozzle thro- at to populate the upper laser level. For a gas mixture of CO2 : NO2 : H2 = 20 : 73 : 7 (%) and a nozzle area ratio of 100, the optimum reservoir temperature and pressure were calculated to be 1200 K and 15 atm, respectively. Because of its high repetition rate and high average-power capabilities, such a conventional GDL can easily provide the power levels required for industrial application of 16-µm laser radiation.