Theory of Laser Radiation

  • W. Thirring
Conference paper
Part of the Supplementa book series (FEWBODY, volume 2/1965)


I was asked to start this sekond week nonrelativistically with a theory of lasers. By this I mean the description of radiation in interaction with matter of negative (absolute) temperature. It is clear that for a treatment satisfactory for theorists we have to idealize the situation. Firstly we replace the atoms by two-level systems (spins) and ignore the other levels. Secondly we start with matter of T = -0 ∞ (all spins up, e.g. in the state of higher energy), which means we consider flashing ruby-lasers rather than continous Ne-He-lasers. Finally we shall ignore the atomistic structure of matter and treat it as a continuum.


Laser Radiation Coherent State Interference Term Laser Material Absolute Phase 
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General References

  1. Singer, J. R., Masers, New York: Wiley and Sons 1959.Google Scholar
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Copyright information

© Springer Science + Business Media, LLC 1965

Authors and Affiliations

  • W. Thirring
    • 1
  1. 1.Universität WienAustria

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