Theory of the photocount statistics for multi-mode multi-frequency radiation fields

Details Theory of the photocount statistics for multi-mode multi-frequency radiation fields Theory of the photocount statistics for multi-mode multi-frequency radiation fields

2009-05-05

arxiv.org/abs/0905.0657v1

Physics

Optics

Scientific paper

We derive on the level of quantum optics expressions for the uncertainty of the photocount in a multi-mode multi-frequency setup. The result depends on the quantum correlations of the individual modes and the frequency spectrum of the radiation, the latter leading to a frequency beating sometimes referred to as dynamic laser speckle. When the mode structure of the radiation field is disturbed between source and detector, another contribution to the photocount uncertainty referred to as static speckle appears. To predict the size of this effect, we present a suitable definition of the etendue (or phase space volume) that links the number of modes of a radiation field to macroscopic quantities.

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