Theory of an electronic-phototransition chemical laser with thermal initiation behind a shock wave front
Journal Article
·
· Sov. J. Quant. Electron. (Engl. Transl.); (United States)
A theory is developed of an electronic-phototransition cw chemical laser initiated by a shock wave in a dense reagent stream. Calculations are made of the population inversion behind the shock wave front in the case of photorecombination reactions. The formation of a waveguide which localizes the lasing mode in the inversion zone is demonstrated. Calculations are made of the optical gain ..cap alpha.. of the waveguide modes. In an analysis of the gas dynamics and chemical kinetics of the laser action an allowance is made for a light-stimulated chemical reaction which alters the spatial dependences of the density, temperature flow velocity, and concentrations of the reagents. The specific optical power P extracted from the stream is determined as a function of the optical losses. Various specific gas mixtures are analyzed and the three most promising for laser applications are selected: NO/sub 2/Cl--Ar, O/sub 3/--Ar, and O/sub 3/--CO. It is shown that an inversion is established for these mixtures over a wide wavelength range and the waveguide formation conditions are compatible with the inversion condition. A gain ..cap alpha..approx. =10/sup -3/cm/sup -1/ and power approx.100 kW per 1 cm/sup 2/ of the gas stream are predicted for these mixtures.
- Research Organization:
- Institute of Semiconductors, Academy of Sciences of the Ukrainian SSR, Kiev
- OSTI ID:
- 5684545
- Journal Information:
- Sov. J. Quant. Electron. (Engl. Transl.); (United States), Journal Name: Sov. J. Quant. Electron. (Engl. Transl.); (United States) Vol. 9:8; ISSN SJQEA
- Country of Publication:
- United States
- Language:
- English
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