Generation of squeezed light in a nonlinear asymmetric directional coupler

TL;DR

This paper demonstrates that a nonlinear asymmetric directional coupler can generate single-mode squeezed light from coherent beams, using nondegenerate parametric amplification, with analysis based on quasiprobability functions, photon-number, and phase distributions.

Contribution

It introduces a novel use of a nonlinear asymmetric directional coupler as an effective source of squeezed light, analyzing specific modes and conditions.

Findings

Successful generation of squeezed light under certain conditions

Analysis of quantum states via quasiprobability functions

Photon-number and phase distribution characterization

Abstract

We show that a nonlinear asymmetric directional coupler composed of a linear waveguide and a nonlinear waveguide operating by nondegenerate parametric amplification is an effective source of single-mode squeezed light. This is has been demonstrated, under certain conditions and for specific modes, for incident coherent beams in terms of the quasiprobability functions, photon-number distribution and phase distribution.