Experimental investigation to influence of pump phase fluctuation on phase-correlation of output optical fields from a non-degenerate parametric oscillator

TL;DR

This paper experimentally investigates how pump laser phase fluctuations affect the phase-correlation of output optical fields from a non-degenerate optical parametric oscillator, confirming theoretical predictions with measured noise spectra.

Contribution

It provides the first experimental validation of the influence of pump phase noise on entangled optical fields in a non-degenerate OPO, aligning with semiclassical theory.

Findings

Pump phase fluctuations impact phase-correlation of output fields.

Measured noise spectra agree with theoretical predictions.

Experimental setup confirms previous theoretical models.

Abstract

The influence of the phase fluctuation of the pump laser on the phase-correlation between the signal and idler modes of the output fields from as non-degenerate optical parametric oscillator operating above oscillation threshold was experimentally investigated. The noise spectra of the intensity-difference and the phase-sum of the entangled optical beams were measured with a pair of unbalanced fiber Match-Zehnder interferometers specifically designed. The experimental results proved the previously theoretical prediction and are in reasonable agreement with the calculation based on semiclassical theory involving the phase fluctuation of pump laser.