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

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

2005-12-19

arxiv.org/abs/quant-ph/0512151v1

Optics Letters 31 (2006) 1537

Physics

Quantum Physics

3 pages

Scientific paper

10.1364/OL.31.001537

We consider the problem of measurement of optical transverse profile parameters and their conjugate variable. Using multi-mode 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 their optimal encoding and detection 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.

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