Dependence of quantum correlations of twin beams on pump finesse of optical parametric oscillator

TL;DR

This paper investigates how the quantum correlations of twin beams produced by an optical parametric oscillator are affected by the pump finesse, considering pump phase noise and excess noise, with theoretical results aligning with experimental data.

Contribution

It provides a semi-classical analysis revealing the dependence of quantum correlations on pump finesse, incorporating pump noise effects, and explains experimental observations quantitatively.

Findings

Quantum phase-sum correlation depends on pump finesse.

Pump phase noise influences quantum correlations.

Theoretical results match experimental data.

Abstract

The dependence of quantum correlation of twin beams on the pump finesse of an optical parametric oscillator is studied with a semi-classical analysis. It is found that the phase-sum correlation of the output signal and idler beams from an optical parametric oscillator operating above threshold depends on the finesse of the pump field when the spurious pump phase noise generated inside the optical cavity and the excess noise of the input pump field are involved in the Langevin equations. The theoretical calculations can explain the previously experimental results, quantitatively.