Sub-shot-noise heterodyne polarimetry

Details Sub-shot-noise heterodyne polarimetry Sub-shot-noise heterodyne polarimetry

2004-06-04

arxiv.org/abs/quant-ph/0406031v2

Opt. Lett. 29, 2800 (2004)

Physics

Quantum Physics

3 pages, 2 figs, some clarifications and one reference added

Scientific paper

10.1364/OL.29.002800

We report the experimental demonstration of a heterodyne polarization rotation measurement with a noise floor 4.8 dB below the optical shot noise, by use of the classically phase-locked quantum twin beams emitted above threshold by an ultrastable type-II Na:KTP CW optical parametric oscillator. We believe this is the largest noise reduction achieved to date on optical phase-difference measurements.

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