Designing Noise-Robust Quantum Networks Coexisting in the Classical Fiber Infrastructure

• URL: http://arxiv.org/abs/2304.09076v2
• Date: Thu, 20 Apr 2023 18:17:06 GMT
• Title: Designing Noise-Robust Quantum Networks Coexisting in the Classical Fiber Infrastructure
• Authors: Jordan M. Thomas, Gregory S. Kanter, Prem Kumar
• Abstract summary: coexistence of multi-channel O-band quantum and C-band classical communications. We characterize multiple narrowband entangled photon pair channels across 1282 nm-1318 nm co-propagating over 48 km installed standard fiber. We analyze the Raman noise spectrum, optimal wavelength engineering, multi-photon pair emission in entangled photon-classical coexistence, and evaluate the implications for future quantum applications.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The scalability of quantum networking will benefit from quantum and classical communications coexisting in shared fibers, the main challenge being spontaneous Raman scattering noise. We investigate the coexistence of multi-channel O-band quantum and C-band classical communications. We characterize multiple narrowband entangled photon pair channels across 1282 nm-1318 nm co-propagating over 48 km installed standard fiber with record C-band power (>18 dBm) and demonstrate that some quantum-classical wavelength combinations significantly outperform others. We analyze the Raman noise spectrum, optimal wavelength engineering, multi-photon pair emission in entangled photon-classical coexistence, and evaluate the implications for future quantum applications.

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