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arXiv · 2201.10177

40 km Fiber Transmission of Squeezed Light Measured with a Real Local Oscillator

Iyad Suleiman·Jens Arnbak Holbøll Nielsen·Xueshi Guo·Nitin Jain·Jonas Schou Neergaard-Nielsen·Tobias Gehring·Ulrik Lund Andersen
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Abstract

We demonstrate the generation, 40 km fiber transmission, and homodyne detection of single-mode squeezed states of light at 1550 nm using real-time phase control of a locally generated local oscillator, often called a "real local oscillator" or "local local oscillator". The system was able to stably measure up to around 3.7 dB of noise suppression with a phase noise uncertainty of around 2.5$^\circ$, using only standard telecom-compatible components and a field-programmable gate array (FPGA). The compactness, low degree of complexity and efficacy of the implemented scheme makes it a relevant candidate for long distance quantum communication in future photonic quantum networks.

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Iyad Suleiman, Jens Arnbak Holbøll Nielsen, Xueshi Guo, Nitin Jain, Jonas Schou Neergaard-Nielsen, Tobias Gehring, Ulrik Lund Andersen. 2022-01-25. 40 km Fiber Transmission of Squeezed Light Measured with a Real Local Oscillator. https://arxiv.org/abs/2201.10177

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