Multi-pass configuration for Improved Squeezed Vacuum Generation in Hot Rb Vapor

We study a squeezed vacuum field generated in hot Rb vapor via the polarization self-rotation effect. Our previous experiments showed that the amount of observed squeezing may be limited by the contamination of the squeezed vacuum output with higher-order spatial modes, also generated inside the cel...

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Bibliographic Details
Published inarXiv.org
Main Authors Zhang, Mi, Guidry, Melissa A, Lanning, R Nicholas, Xiao, Zhihao, Dowling, Jonathan P, Novikova, Irina, Mikhailov, Eugeniy E
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 10.05.2017
Subjects
Compressing
Configurations
Optimization
Physics - Atomic Physics
Physics - Quantum Physics
Rubidium
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Summary:We study a squeezed vacuum field generated in hot Rb vapor via the polarization self-rotation effect. Our previous experiments showed that the amount of observed squeezing may be limited by the contamination of the squeezed vacuum output with higher-order spatial modes, also generated inside the cell. Here, we demonstrate that the squeezing can be improved by making the light interact several times with a less dense atomic ensemble. With optimization of some parameters we can achieve up to -2.6 dB of squeezing in the multi-pass case, which is 0.6 dB improvement compared to the single-pass experimental configuration. Our results show that other than the optical depth of the medium, the spatial mode structure and cell configuration also affect the squeezing level.
ISSN:2331-8422
DOI:10.48550/arxiv.1705.02914