Towards single-cycle squeezing in chirped quasi-phase-matched optical parametric down-conversion

TL;DR

This paper introduces a method to generate ultrabroadband, single-cycle squeezed light through parametric down-conversion in a chirped quasi-phase-matched crystal, with an exact quantum solution and a proposed detection scheme.

Contribution

It presents a novel approach for ultrabroadband squeezing with an exact quantum solution and a practical observation scheme, advancing quantum optics capabilities.

Findings

Ultrabroadband squeezing spectrum covering a full optical octave

Exact quantum solution valid for any parametric gain

Proposed detection scheme using second-harmonic generation

Abstract

We propose a method for generation of a single-cycle squeezed light by parametric down-conversion in a chirped quasi-phase-matched nonlinear crystal. We find an exact quantum solution for this process valid for an arbitrary parametric gain, and discover an ultrabroadband squeezing in the down-converted light with flat squeezing spectrum comprising the full optical octave. We describe a scheme for observation of this kind of squeezing using second-harmonic generation as an ultrafast correlator.