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A simple quantum picture for the Petermann excess noise factor

  • Ph. Grangier
  • J.-Ph. Poizat

Abstract:

We present a very simple “toy model” that allows one to recover the essential mathematical and physical features that lead to excess quantum noise and excess linewidth in lasers with unstable resonators. In a consistent quantum mechanical description, the excess noise factor (Petermann factor) is physically attributed to loss-induced coupling between the cavity eigenmodes.

PACS. 42.40.Lc Quantum fluctuations, quantum noise, and quantum jumps - 42.55.Ah General laser theory - 42.60.Da Resonators, cavities, amplifiers, arrays, and rings 

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Copyright information

© EDP Sciences, Springer-Verlag 1998

Authors and Affiliations

  • Ph. Grangier
    • 1
  • J.-Ph. Poizat
    • 1
  1. 1.Institut d'Optique, BP 147, 91403 Orsay Cedex, FranceFR

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