Related Experiment Video
Updated: Jul 31, 2025
06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
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Synchronization and coexistence in quantum networks
Optics Express
|May 8, 2023
Summary
This study shows that quantum signals and classical clock synchronization protocols can coexist in optical fibers. Up to 100 quantum channels can share fiber with synchronization signals, enabling new communication possibilities.
Area of Science:
- Quantum communication
- Optical fiber technology
- Network synchronization
Background:
- Coexistence of quantum and classical signals in optical fibers is crucial for future integrated networks.
- Clock synchronization protocols are essential for high-performance communication systems.
Purpose of the Study:
- To investigate the feasibility of coexisting quantum channels and clock synchronization protocols in a single-mode optical fiber.
- To compare the performance of different synchronization protocols in this shared environment.
Main Methods:
- Optical noise measurements were performed across the 1500 nm to 1620 nm spectrum.
- Characterization and comparison of "White Rabbit" and pulsed laser-based synchronization protocols.
- Theoretical analysis of fiber link length limitations for coexisting channels.
Main Results:
- Demonstrated potential for up to 100 quantum, 100 GHz wide channels to coexist with classical synchronization signals.
- Established a theoretical maximum fiber link length of approximately 100 km for current optical transceivers.
- Identified significant potential for improvement using quantum receivers.
Conclusions:
- Coexistence of quantum and classical signals in optical fibers is achievable.
- Synchronization protocols can be integrated with quantum communication channels without significant degradation.
- Future advancements in quantum receivers can extend the viable link length for such integrated systems.
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