Experimental demonstration of frequency-degenerate bright EPR beams with a self-phase-locked OPO

2008/04/30 by G. Keller, Gaelle Keller, Virginia D’Auria +6 · 4 citations
Computer Science · Physics and Astronomy · #Quantum Information and Cryptography #Quantum optics and atomic interactions #Spectroscopy and Quantum Chemical Studies #quant-ph

paper · pdf · doi:10.1364/oe.16.009351

published as Optics express 16 (2008) 9351

openalex publication_date 2008/06/10 · arxiv created 2008/06/12 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We report the first experimental observation of bright EPR beams produced by a type-II optical parametric oscillator operating above threshold at frequency degeneracy. The degenerate operation is obtained by introducing a birefringent plate inside the cavity resulting in phase locking. After filtering the pump noise, which plays a critical role, continuous-variable EPR correlations between the orthogonally polarized signal and idler beams are demonstrated.

Citations

• Can Quantum-Mechanical Description of Physical Reality Be Considered Complete?
• Non-linear and quantum optics of a type II OPO containing a birefringent element
• Criteria of quantum correlation in the measurement of continuous variables in optics
• Non-linear and quantum optics of a type II OPO containing a birefringent element

Cited by

• Continuous variable entanglement enhancement and manipulation by a subthreshold Type II optical parametric amplifier
• Full Characterization of Gaussian Bipartite Entangled States by a Single Homodyne Detector
• Colloquium: The Einstein-Podolsky-Rosen paradox: From concepts to applications
• Precision measurements with photon-subtracted or photon-added Gaussian states