formule de Schawlow-Townes

[1976] The uncertainty principle and the spectral width of a laser beam ; Hugo Weichel ; American Journal of Physics 44 (sep 1976) p. 839 [lien]
[1978] A simple derivation of the bandwidth of a laser oscillator ; L. W. Anderson ; J. E. Lawler ; American Journal of Physics 46 (fev 1978) p. 162 [lien]
[1979] How monochromatic is laser light? ; Stephen F. Jacobs ; American Journal of Physics 47 (jul 1979) p. 597 [lien]