Observation of quantum noise reduction on twin laser beams
Abstract
We have used a two-mode optical parametric oscillator operating above threshold to generate high-intensity twin beams which exhibit quantum correlations. The noise power measured on the intensity difference between two such beams is reduced by 30% below the shot-noise limit. Noise reduction is observed over a broad range of frequencies.
- Publication:
-
Physical Review Letters
- Pub Date:
- November 1987
- DOI:
- 10.1103/PhysRevLett.59.2555
- Bibcode:
- 1987PhRvL..59.2555H
- Keywords:
-
- 42.50.Dv;
- Nonclassical states of the electromagnetic field including entangled photon states;
- quantum state engineering and measurements