Telecommunication Compatibility Evaluation for Co-existing Quantum Key Distribution in Homogenous Multicore Fiber

IEEE Access

Rui Lin¹  Guilherme B. Xavier²  Sergei Popov³  Xiaodan Pang³  Thiago Ferreira Da Silva⁴  Oskars Ozolins⁵  Aleksejs Udalcovs⁵  Lin Gan⁶  Songnian Fu⁶  Ming Tang⁶  Jiajia Chen⁷ 

[1] Department of Electrical Engineering, Chalmers University of Technology, Gothenburg, Sweden;Institutionen f&x00F6;KTH Royal Institute of Technology, Kista, Sweden;Optical Metrology Division, National Institute of Metrology, Quality and Technology, Duque de Caxias, Brazil;RISE Research Institutes of Sweden AB, Kista, Sweden;School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China;r Systemteknik, Link&x00F6;

关键词: Quantum key distribution;    spatial division multiplexing;    telecommunications;    communication system security;   

DOI  :  10.1109/ACCESS.2020.2990186

来源: DOAJ

【 摘 要 】

Quantum key distribution (QKD) is regarded as an alternative to traditional cryptography methods for securing data communication by quantum mechanics rather than computational complexity. Towards the massive deployment of QKD, embedding it with the telecommunication system is crucially important. Homogenous optical multi-core fibers (MCFs) compatible with spatial division multiplexing (SDM) are essential components for the next-generation optical communication infrastructure, which provides a big potential for co-existence of optical telecommunication systems and QKD. However, the QKD channel is extremely vulnerable due to the fact that the quantum states can be annihilated by noise during signal propagation. Thus, investigation of telecom compatibility for QKD co-existing with high-speed classical communication in SDM transmission media is needed. In this paper, we present analytical models of the noise sources in QKD links over heterogeneous MCFs. Spontaneous Raman scattering and inter-core crosstalk are experimentally characterized over spans of MCFs with different refractive index profiles, emulating shared telecom traffic conditions. Lower bounds for the secret key rates and quantum bit error rate (QBER) due to different core/wavelength allocation are obtained to validate intra- and inter-core co-existence of QKD and classical telecommunication.

【 授权许可】

Unknown