Quantum noise correlations of an optical parametric oscillator based on a non-degenerate four wave mixing process in hot alkali atoms

Abstract

We present the first measurement of two-mode squeezing between the twin beams produced by a doubly resonant optical parameter oscillator (OPO) in above threshold operation, based on parametric amplification by non degenerate four wave mixing with rubidium ${}^{85}$Rb. We demonstrate a maximum intensity difference squeezing of -2.7 dB (-3,5 dB corrected for losses) with a pump power of 285 mW and an output power of 12 mW for each beam, operating close to the D1 line of Rb atoms. The possibility to use open cavities combined with the high gain media can provide a strong level of noise compression, and the access to new operation regimes that could not be explored by crystal based OPOs. The spectral bandwidth of the squeezed light is broadened by the cavity dynamics, and the squeezing level is robust for strong pump powers. Stable operation was obtained up to four times above the threshold. Moreover, its operation close to the atomic resonances of alkali atoms allows a natural integration into quantum networks including structures such as quantum memories.

arXiv comment6 pages, 10 figures

References in corpus (16)

• Ultra-Large-Scale Continuous-Variable Cluster States Multiplexed in the Time Domain
• Experimental realization of multipartite entanglement of 60 modes of a quantum optical frequency comb
• Strong relative intensity squeezing by 4-wave mixing in Rb vapor
• On-Chip Optical Squeezing
• Generation of Bright Two-Color Continuous Variable Entanglement
• Parallel generation of quadripartite cluster entanglement in the optical frequency comb
• Generation and characterization of multimode quantum frequency combs
• Role of the phase-matching condition in non-degenerate four-wave mixing in hot vapors for the generation of squeezed states of light
• Demonstration of the spatial separation of the entangled quantum side-bands of an optical field
• Violation of the Cauchy-Schwarz Inequality in the Macroscopic Regime
• Optical nonlinear dynamics with cold atoms in a cavity
• Strong quantum correlations in four wave mixing in ${}^{85}$Rb vapor
• Rotation of the noise ellipse for squeezed vacuum light generated via four-wave-mixing
• Compact sub-kilohertz low-frequency quantum light source based on four-wave mixing in cesium vapor
• Triply-resonant Optical Parametric Oscillator by Four-wave Mixing with Rubidium Vapor inside an Optical Cavity
• Exploring entanglement in open cavity parametric oscillators: from triply to doubly resonant cavities

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• Transmission Estimation at the Fundamental Quantum Cramér-Rao Bound with Macroscopic Quantum Light
• Unraveling two-photon entanglement via the squeezing spectrum of light traveling through nanofiber-coupled atoms
• Role of seeding in the generation of polarization squeezed light by atomic Kerr medium
• Estimation of heavy tails in optical non-linear processes