Nonlinear interferometer for tailoring the frequency spectrum of bright squeezed vacuum

TL;DR

This paper introduces a nonlinear interferometer approach to modify the frequency spectrum of bright squeezed vacuum, achieving spectral narrowing through dispersive spreading, with initial results indicating a 30% reduction.

Contribution

It presents a novel method using a nonlinear interferometer with dispersive media to control the spectral properties of bright squeezed vacuum.

Findings

Achieved 30% spectral narrowing in preliminary experiments.

Demonstrated that higher-order Schmidt modes spread faster, reducing spectral width.

Proposed a new technique for spectral tailoring in quantum optics.

Abstract

We propose a method for tailoring the frequency spectrum of bright squeezed vacuum by generating it in a nonlinear interferometer, consisting of two down-converting nonlinear crystals separated by a dispersive medium. Due to a faster dispersive spreading of higher-order Schmidt modes, the spectral width of the radiation at the output is reduced as the length of the dispersive medium is increased. Preliminary results show 30\% spectral narrowing.