Toward a compact fibered squeezing parametric source

TL;DR

This paper explores three compact fiber-based systems for generating vacuum squeezing, aiming to develop miniaturized devices that facilitate integration into quantum optical systems.

Contribution

It introduces three novel fibered squeezing sources using different fiber types, demonstrating their potential for scalable, integrated quantum optics applications.

Findings

Achieved modest squeezing levels of -0.56 dB, -0.9 dB, and -1 dB.

Demonstrated the feasibility of fiber-coupled squeezing devices.

Opened pathways for miniaturized quantum squeezing sources.

Abstract

In this work, we investigate three different compact fibered systems generating vacuum squeezing that involve optical cavities limited by the end surface of a fiber and by a curved mirror and containing a thin parametric crystal. These systems have the advantage to couple squeezed states directly to a fiber, allowing the user to benefit from the flexibility of fibers in the use of squeezing. Three types of fibers are investigated: standard single-mode fibers, photonic-crystal large mode area single-mode fibers and short multi-mode fiber taped to a single-mode fiber. The observed squeezing is modest (-0.56 dB, -0.9 dB, -1 dB), but these experiments open the way to miniaturized squeezing devices that could be a very interesting advantage in scaling up quantum systems for quantum processing, opening new perspectives in the domain of integrated quantum optics.