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8 March 2023 Quantum frequency conversion of vacuum squeezed light to bright tunable blue squeezed light
Hugo Kerdoncuf, Jesper B. Christensen, Mikael Lassen
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Proceedings Volume 12447, Quantum Sensing, Imaging, and Precision Metrology; 124470C (2023) https://doi.org/10.1117/12.2646662
Event: SPIE Quantum West, 2023, San Francisco, California, United States
Abstract
Quantum frequency conversion, the process of shifting the frequency of an optical quantum state while preserving quantum coherence, can be used to produce non-classical light at otherwise unapproachable wavelengths. We present experimental results based on highly efficient sum-frequency generation (SFG) between a vacuum squeezed state at 1064 nm and a tunable pump source at 850 nm ± 50 nm for the generation of bright squeezed light at 472 nm ± 4 nm. We demonstrate that the SFG process conserves part of the quantum coherence as a 4.2(±0.2) dB 1064 nm vacuum squeezed state is converted to a 1.6(±0.2) dB tunable bright blue squeezed state.
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Hugo Kerdoncuf, Jesper B. Christensen, and Mikael Lassen "Quantum frequency conversion of vacuum squeezed light to bright tunable blue squeezed light", Proc. SPIE 12447, Quantum Sensing, Imaging, and Precision Metrology, 124470C (8 March 2023); https://doi.org/10.1117/12.2646662
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KEYWORDS
Vacuum
Quantum frequencies
Quantum efficiency
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