Correlation measurement of squeezed light

Leonid Krivitsky, Ulrik Lund Andersen, R. Dong, Alexander Huck, C. Wittmann, G. Leuchs

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We study the implementation of a correlation measurement technique for the characterization of squeezed light which is nearly free of electronic noise. With two different sources of squeezed light, we show that the sign of the covariance coefficient, revealed from the time-resolved correlation data, is witnessing the presence of squeezing in the system. Furthermore, we estimate the degree of squeezing using the correlation method and compare it to the standard homodyne measurement scheme. We show that the role of electronic detector noise is minimized using the correlation approach as opposed to homodyning where it often becomes a crucial issue.
Original languageEnglish
JournalPhysical Review A
Issue number3
Pages (from-to)033828
Publication statusPublished - 2009

Bibliographical note

Copyright 2009 American Physical Society


  • optical parametric oscillators
  • optical correlation
  • optical noise
  • optical fibres
  • optical squeezing


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