Generation of multi-mode squeezed vacuum using pulse pumped fiber optical parametric amplifiers

Optics Express
Nannan LiuXiaoying Li

Abstract

Multimode squeezed states are essential resources in quantum information processing and quantum metrology with continuous variables. Here we present the experimental generation of squeezed vacuum via the degenerate four wave mixing realized by pumping a piece of dispersion shifted fiber with mode-locked ultrafast pulse trains. The noise fluctuation is lower than the shot noise limit by 1.1 ± 0.08 dB (1.95 ± 0.17 dB after correction for detection losses). The detailed investigation illustrates that the results can be further improved by suppressing Raman scattering and by reshaping the spectrum of the local oscillator to achieve the required mode-matching of the homodyne detection system. Our study is useful for developing a compact fiber source of multi-mode squeezed vacuum.

References

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Citations

Dec 15, 2018·Optics Letters·Biao XiongLing Zhou
May 15, 2021·Optics Express·Nannan LiuXiaoying Li

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