Suppression of the four-wave mixing amplification via Raman absorption

Abstract

We propose a method to controllably suppress the effect of the four-wave mixing caused by the coupling of the strong control optical field to both optical transitions in the $\Lambda$ system under the conditions of electromagnetically induced transparency. At sufficiently high atomic density, this process leads to amplification of a weak optical signal field, that is detrimental for the fidelity of any EIT-based quantum information applications. Here we show that an additional absorption resonance centered around the idler field frequency, generated in such a four-wave mixing process, may efficiently suppress the unwanted signal amplification without affecting properties of the EIT interaction. We discuss the possibility of creating such tunable absorption using two-photon Raman absorption resonances in the other Rb isotope, and present some preliminary experimental results.

arXiv comment13 pages, 8 figures

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Cited by in corpus (8)

• Room-temperature single-photon source with near-millisecond built-in memory
• Theory of noise suppression in Λ-type quantum memories by means of a cavity
• Raman Quantum Memory with Built-In Suppression of Four-wave Mixing Noise
• Storing short single-photon-level optical pulses in Bose-Einstein condensates for high-performance quantum memory
• Superradiance-Mediated Photon Storage for Broadband Quantum Memory
• Single-photon-level light storage in cold atoms using the Autler-Townes splitting protocol
• High Efficiency Raman Memory by Suppressing Radiation Trapping
• Suppression of Four-Wave Mixing in Hot Rubidium Vapor Using Ladder Scheme Raman Absorption