期刊
OPTICS EXPRESS
卷 31, 期 23, 页码 38255-38267出版社
Optica Publishing Group
DOI: 10.1364/OE.501989
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In this study, we actively controlled atomic coherence and interference in degenerate four-wave mixing (DFWM) through energy-level modulation, resulting in enhanced DFWM gain for the generation of near-resonant squeezed twin beams.
Squeezed light near an atomic resonance is beneficial for efficient atom-light quantum interfaces. It is desirable but challenging to directly generate in atoms due to excess noise from spontaneous emission and reabsorption. Here, we report on the use of energy-level modulation to actively control atomic coherence and interference in degenerate four-wave mixing (DFWM) and then to enhance the DFWM gain process for the generation of near-resonant squeezed twin beams. With this technique, we obtain a -2.6 dB intensity-difference squeezing detuned 100 MHz from the D1 F = 4 to F' = 4 transition of 133Cs.
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