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Thermal source of stimulated radiation

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Cechoslovackij fiziceskij zurnal B Aims and scope

Abstract

The action of a source of stimulated radiation is investigated under conditions when the energy is supplied from a thermal reservoir. For the three-level system a calculation based on thermodynamic considerations and kinetic equations is carried out. Relations expressing the dependence of the minimum temperature of the hot reservoir, which is necessary for inversion, on the parameters of the system and on the maximum intensity of exciting radiation are found.

The expression for the efficiency of conversion of thermal energy into stimulated radiation isη max<(1−T 0/T)(A 32−A 21)/(A 32+A 31).

This efficiency is always lower than the Carnot efficiency and depends also on the value of the Einstein coefficients for spontaneous emission between different levels.

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Authors and Affiliations

  1. Institute of Physics, Czechosl. Acad. Sci., Prague, Lumumbova 1, Praha 8

    J. Pastrňák

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  1. J. Pastrňák
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The author heartily thanks M. Trlifaj, K. Pátek and A. Fousková for stimulating discussions.

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Pastrňák, J. Thermal source of stimulated radiation. Czech J Phys 15, 379–390 (1965). https://doi.org/10.1007/BF01689248

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  • DOI: https://doi.org/10.1007/BF01689248

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