Enhanced squeezing of four-wave mixing by phase-sensitive dressed effect in a hot atomic system

Abstract

In this paper, we demonstrate that the intensity difference squeezing (IDS) of parametric amplified four-wave mixing (PA-FWM) can be modulated by the phase-sensitive dressed effect in a hot rubidium (Rb) atomic system. The introduction of phase-sensitive dressed effect can enhance the degree of IDS of PA-FWM to −8.1 dB, as compared to that in the phaseinsensitive dressed PA-FWM of −6.6 dB. The phase-sensitive dressing field can not only enhance the degree of IDS of PA-FWM by the dressed effect, but can also be treated as the seed beam of the PA-six wave mixing process. So, double-injected three-mode IDS obviously has a bigger degree of IDS compared with the single-injection case. One advantage of the current scheme for enhancing the generated IDS is that the experimental setup is simple and mechanically stable. These outcomes can be used in the fabrication of quantum devices and the realization of quantum metrology.

Coherent near-infrared light generation based on self-seeded parametric four-wave mixing in Rb vapor

“…These novel lasers combine the characteristics of both gas and solid-state lasers, and can be used as excellent substitutes of solid-state and chemical lasers owing to high quantum efficiency, high beam quality and better thermal management. High power DPALs can be used to charge remote photovoltaic cells and remote material processing [2], whereas moderate to low power DPALs with narrow linewidth are suitable for research in quantum optics [3,4], optical communication [5] and atomic physics [6,7]. * Authors to whom any correspondence should be addressed.…”