Quantum measurements of spatial conjugate variables: displacement and tilt of a Gaussian beam

Optics Letters
V DelaubertHans-A Bachor

Abstract

We consider the problem of measurement of optical transverse profile parameters and their conjugate variable. Using multimode analysis, we introduce the concept of detection noise modes. For Gaussian beams, displacement and tilt are a pair of transverse-profile conjugate variables. We experimentally demonstrate the optimal encoding and detection of these variables with a spatial homodyning scheme. Using higher-order spatial mode squeezing, we show the sub-shot-noise measurements for the displacement and tilt of a Gaussian beam.

References

Feb 28, 2002·Physical Review Letters·Warwick P BowenPing Koy Lam
Aug 16, 2003·Science·Nicolas TrepsPing Koy Lam
Aug 25, 2004·Physical Review Letters·N K LangfordA G White

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Citations

Apr 22, 2009·Applied Optics·Jian Wei TayWarwick P Bowen
May 4, 2016·Optics Express·Marion SemmlerGerd Leuchs
Oct 19, 2017·Optics Express·Pauline BoucherNicolas Treps
Sep 22, 2020·Physical Review Letters·Manuel GessnerNicolas Treps
Nov 28, 2008·Optics Letters·B Coutinho Dos SantosJ A O Huguenin
Oct 15, 2008·Physical Review Letters·Brahim LamineNicolas Treps

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