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 (LO), often called a 'real LO' or 'local LO'. 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°, using only standard telecom-compatible components and a field-programmable gate array. 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.
Original language | English |
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Article number | 045003 |
Journal | Quantum Science and Technology |
Volume | 7 |
Issue number | 4 |
Number of pages | 10 |
DOIs | |
Publication status | Published - 2022 |
Keywords
- Homodyne detection
- Local local oscillator
- Photonic
- Quantum information
- Quantum key distribution
- Real local oscillator
- Squeezed