Abstract
In this work, temporal correlations of radiation intensities of a multimode Fabry-Perot (FP) semiconductor laser are studied. Second- and third-order intensity correlation functions are measured both for the multimode FP laser and a pulsed Ti: Sapphire (TiSp) laser. Triple correlators of the latter demonstrate an ordinary product of double correlators (the classic case). The behavior of the multimode laser is more complex and can indicate the quantum nature of optical field correlations. We follow a specific phenomenological formula for calculation of the triple temporal correlator.
Highlights
Measurements of light field intensity correlations in two different spatial-temporal points are widely used in modern quantum optics
We have revealed that the intensity correlation function g(2) obtained by an ordinary Hanbury Brown and Twiss (HBT) scheme depends critically on the number of simultaneously selected modes
We have focused on measurements of third-order intensity correlation functions share of quantum correlations occurs when the number of simultaneously detected longitudinal modes in the hope that these measurements will provide more information about the nature of the noticeably decreases
Summary
Measurements of light field intensity correlations in two different spatial-temporal points are widely used in modern quantum optics. These correlations strongly depend on optical path difference so the effect of an intensity correlation is often termed the intensity interference effect. Most light sources are not bright enough, so measurements of high-order correlators require long integration times to obtain a reasonable signal. This in turn sets high requirements for long-term light stability as well as internal noises of light detectors.
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