Estimation of Kerr Nonlinearity in an Anti-resonant Hollow-Core Fiber by High-order QAM Transmission

Ge, Dawei; Gao, Shoufei; Zuo, Mingqing; Gao, Yuyang; Wang, Y T; Yan, Baoluo; Ye, Bing; Zhang, Dechao; Ding, Wei; Li, Han; Chen, Zhangyuan

doi:10.1364/ofc.2023.w4d.6

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2024

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Cited by 2 publications

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502.6 Tbit/s S+C+L-Band Transmission in Anti-Resonant Hollow-Core Fiber

Liu,

Li,

Liu

et al. 2024

2024 Asia Communications and Photonics Conference (ACP) and International Conference on Information Photonics and Optical Commu

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502.6 Tbit/s S+C+L-Band Transmission in Anti-Resonant Hollow-Core Fiber

Liu,

Li,

Liu

et al. 2024

2024 Asia Communications and Photonics Conference (ACP) and International Conference on Information Photonics and Optical Commu

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Enhanced Coexistence of Quantum Key Distribution and Classical Communication over Hollow-Core and Multi-Core Fibers

Kong,

Sun,

Dou

et al. 2024

Entropy

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In this paper, we investigate the impact of classical optical communications in quantum key distribution (QKD) over hollow-core fiber (HCF), multi-core fiber (MCF) and single-core fiber (SCF) and propose wavelength allocation schemes to enhance QKD performance. Firstly, we theoretically analyze noise interference in QKD over HCF, MCF and SCF, such as spontaneous Raman scattering (SpRS) and four-wave mixing (FWM). To mitigate these noise types and optimize QKD performance, we propose a joint noise suppression wavelength allocation (JSWA) scheme. FWM noise suppression wavelength allocation and Raman noise suppression wavelength allocation are also proposed for comparison. The JSWA scheme indicates a significant enhancement in extending the simultaneous transmission distance of classical signals and QKD, reaching approximately 100 km in HCF and 165 km in MCF under a classical power per channel of 10 dBm. Therefore, MCF offers a longer secure transmission distance compared with HCF when classical signals and QKD coexist in the C-band. However, when classical signals are in the C-band and QKD operates in the O-band, the performance of QKD in HCF surpasses that in MCF. This research establishes technical foundations for the design and deployment of QKD optical networks.

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Estimation of Kerr Nonlinearity in an Anti-resonant Hollow-Core Fiber by High-order QAM Transmission

Abstract: We propose a novel technique to measure Kerr nonlinearity in a hollow-core fiber based on nonlinear phase shift estimation by high-order QAM transmission. The measured n2,Kerr of the NANF-5 medium is <2.20×10-23 m2/W.

Cited by 2 publications

References 6 publications

502.6 Tbit/s S+C+L-Band Transmission in Anti-Resonant Hollow-Core Fiber

502.6 Tbit/s S+C+L-Band Transmission in Anti-Resonant Hollow-Core Fiber

Enhanced Coexistence of Quantum Key Distribution and Classical Communication over Hollow-Core and Multi-Core Fibers

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