Experimental study of the spatial distribution of quantum correlations in a confocal optical parametric oscillator
Abstract
We study experimentally the spatial distribution of quantum noise in the twin beams produced by a type-II optical parametric oscillator operating in a confocal cavity above threshold. The measured intensity correlations are at the same time below the standard quantum limit and not uniformly distributed inside the beams. We show that this feature is an unambiguous evidence for the multimode and nonclassical character of the quantum state generated by the device.
- Publication:
-
Physical Review A
- Pub Date:
- February 2003
- DOI:
- 10.1103/PhysRevA.67.023808
- arXiv:
- arXiv:quant-ph/0210023
- Bibcode:
- 2003PhRvA..67b3808M
- Keywords:
-
- 42.50.Dv;
- 42.65.Yj;
- 42.30.-d;
- 42.50.Lc;
- Nonclassical states of the electromagnetic field including entangled photon states;
- quantum state engineering and measurements;
- Optical parametric oscillators and amplifiers;
- Imaging and optical processing;
- Quantum fluctuations quantum noise and quantum jumps;
- Quantum Physics
- E-Print:
- 20 pages, 5 figures, submitted to Phys. Rev. A