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Brief Communications

Influence of admixtures on the gain of a gasdynamic carbon dioxide laser

A. B. Britan, S. A. Losev, O. P. Shatalov


Abstract: A shock tube with an internal diameter of 500 mm and a planar 30° nozzle at one end was used in a study of the influence of O₂, H₂, CO, H₂O, C₂H₂, and C₂H₄ admixtures on the gain of a 15% CO₂+83% N₂+2% H₂O gasdynamic laser. The pressure of the active mixture in the entry plane of the nozzle was 5.3 atm and its temperature was 1790°K. it was found that the addition of diatomic molecules in amounts up to 10–14% had little influence on the measured gain. Polyatomic molecules had a stronger influence (they reduced the gain) but throughout the investigated range of the admixtures (up to 16%) the gain was still positive.

UDC: 621.375.826

PACS: 42.55.Lt, 42.60.Lh

Received: 17.06.1974

 English version: Soviet Journal of Quantum Electronics, 1975, 4:12, 1459–1460