Intensity quantum noise reduction with an above-threshold optical parametric oscillator

Katsuyuki Kasai, Jiangrui Gao, Ling-An Wu +1 more

Thierry Debuisschert, Serge Reynaud, A. Heidmann +2 more

The authors have observed a quantum noise reduction of 69% around 2 MHz on the intensity difference between the two beams generated by a non-degenerate optical parametric oscillator operating above threshold.

Claude Fabre, E. Giacobino, A. Heidmann +1 more

A semi-classical analysis of the noise characteristics of a non degenerate, above threshold, optical parametric oscillator is presented, yielding expressions for the quantum fluctuations of the output field intensities and phases. Particular emphasis is given to the study of the noise on the intensity difference between the two generated fields. The effect of losses, unbalance, detunings and excess pump noise is investigated. A significant quantum noise reduction is found over a broad domain of the parameter space.

P. D. Drummond, Alistair S. Lane, Daniel F. Walls

Daniel F. Walls, P. D. Drummond, Alistair S. Lane +3 more

Jerome C. Mertz, Thierry Debuisschert, A. Heidmann +2 more

We report an observed quantum noise reduction of 86% (8.5 dB) near 3 MHz in the intensity difference between the twin beams generated by a nondegenerate type II optical parametric oscillator operating above threshold.