[en] The gas dynamic laser device is provided with an expansion chamber arranged between a heating chamber for the CO-gas and the resonance chamber. The expansion chamber is initially evacuated for producing a rarefaction wave. Between the heating chamber and the expansion chamber there are arranged rapid release means such as a valve or a diaphragm. Pressure recovering means are connected to the other side of the resonance chamber

No abstract available

[en] The output power of a high power (1 kW or more) CO₂ gas transport laser is stabilized by flowing the gas mixture over copper plated baffles in the gas channel during operation of the laser. Several other metals may be used instead of copper, for example, nickel, manganese, palladium, platinum, silver and gold. The presence of copper in the laser gas circuit stabilizes output power by what is believed to be a compensation of the chemical changes in the gas due to the cracking action of the electrical discharge which has the effect of diminishing the capactiy of the carbon dioxide gas mixture to maintain the rated power output of the laser. (U.S.)

[en] A mechanism is proposed for producing coherent radiation in CO₂ vibrational-rotational transitions at wavelengths near 14 and 16 microns. A device configuration for its implementation is given. (U.S.)

[en] The device includes a closed cycle gasdynamic laser wherein the lasing fluid is recirculated in a closed loop. The closed loop includes a nozzle array, a lasing cavity and a diffuser. The exit of the diffuser is connected to the inlet to the nozzle array with a fuel heat exchanger located in the lasing flow and a pumping means located between the heat exchanger and the nozzle array. To provide for cooling of the pumping means and to improve diffuser performance, gas bled from the diffuser is cooled by two heat exchangers and pumped into cooling passages in the pumping means. The heat exchangers for cooling the flow to the pumping means are located in series and carry fuel from a supply to an injector in said combustor and the heat exchanger in the lasing flow cools the fluid and carries the fuel from a supply to an injector in said combustor. (U.S.)

No abstract available

[en] Energies of the rotational-vibrational transition lines are studied in a turnable TEA CO₂ laser which consists of three cavity mirrors by the use of the grating-output-reflector configuration. In this system, the energy of the 10.6 μm P-20 line is more enchanced by about 5 percent than other transition lines. This effect is attributed to the pressure broadening of the hot band R-23 ((0,1¹,1)-(1,1¹,0)) transition in 10.6 μm P-20 line. The experimental values are absorbed to agree with the theoretical results. (Author)

No abstract available

[en] Output power, gas charge composition, and electrical discharge properties of the intermediate high repetition rate laser (intermediate HRRL) were measured. Factors, other than the normal progressive loss of CO₂ due to electrical discharge, controlling the output power were investigated. The conversion of CO₂ into CO an O₂ is an important effect leading to power loss in the HRRL

[en] The gain saturation properties of a double discharge CO₂ laser for nanosecond pulses are presented. The results found are in good agreement with those appearing in the literature. (U.S.)