Squeezing at a telecom wavelength, a compact and fully guided-wave approach

TL;DR

This paper reports the first fully guided-wave squeezing experiment at telecom wavelength, using waveguide non-linear optics and telecom fibre components, achieving significant squeezing and high stability for quantum communication applications.

Contribution

It introduces a fully guided-wave approach for squeezing at telecom wavelength, combining waveguide technology with fibre components for enhanced stability and practicality.

Findings

Achieved up to -1.83 dB of squeezing at 1542 nm.

Demonstrated a compact, stable setup suitable for quantum communication.

First realization of guided-wave squeezing at telecom wavelength.

Abstract

We demonstrate, for the first time, the realization of an entirely guided-wave squeezing experiment at a telecom wavelength. The state generation relies on waveguide non-linear optics technology while squeezing collection and transmission are implemented by using only telecom fibre components. We observe up to $-1.83\pm0.05$ dB of squeezing emitted at 1542 nm in CW pumping regime. The compactness and stability of the experiment, compared to free-space configurations, represent a significant step towards achieving out-of-the-lab CV quantum communication, fully compatible with existing telecom fibre networks. We believe that this work stands as a promising approach for real applications as well as for "do-it-yourself" experiments