Journal
LASER PHYSICS LETTERS
Volume 16, Issue 5, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1612-202X/ab11e4
Keywords
intensity difference squeezing; parametric amplified four-wave mixing; gain
Categories
Funding
- National Key R&D Program of China [2017YFA0303703]
- NSFCs [11474228]
- China Postdoctoral Science Foundation [2016M590935]
- NSF of Shaanxi Province [2016JM6029]
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We report that the optical gain and intensity difference squeezing (IDS) of four-wave mixing can be controlled using an external dressing field in a hot rubidium atomic system. The intensity of the parametric amplified four-wave mixing (PA-FWM) signal in the probe and corresponding conjugate channels can be enhanced using the dressed effect, resulting in an increase of the optical gain. So, the IDS in the dressed PA-FWM has a higher degree of -7.1 dB, as compared to that in the PA-FWM of -2.5 dB. This scheme of enhancing the optical gain and the generated IDS requires a simple experimental setup that is mechanically stable. These outcomes can be used in the fabrication of quantum devices and the realization of quantum metrology.
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