A novel experimental preparation of Gaussian modulated coherent state based on dual-drive Mach-Zehnder modulator in continuous variable quantum key distribution

Heng Wang; Yaodi Pi; Wei Huang; Yun Shao; Yang Li; Bingjie Xu

doi:10.1117/12.2573860

10 October 2020 A novel experimental preparation of Gaussian modulated coherent state based on dual-drive Mach-Zehnder modulator in continuous variable quantum key distribution

Heng Wang, Yaodi Pi, Wei Huang, Yun Shao, Yang Li, Bingjie Xu

Author Affiliations +

Proceedings Volume 11558, Quantum and Nonlinear Optics VII; 115580O (2020) https://doi.org/10.1117/12.2573860
Event: SPIE/COS Photonics Asia, 2020, Online Only

Conference Poster

Abstract

In this paper, a novel experimental preparation scheme of Gaussian modulated coherent state (GMCS) in continuous variable quantum key distribution (CVQKD) system is proposed based on dual-drive Mach-Zehnder modulator (DDMZM). The experimental implementation of the proposed GMCS preparation scheme only depends on a DDMZM instead of an AM and a PM in conventional CVQKD, which simplifies the experimental setup and reduces the costs of the CVQKD system. Moreover, the sum-difference signals of the Rayleigh distribution and uniform distribution are applied on two parallel electrodes of the DDMZM, respectively, getting rid of the accurate time-delay alignment between the AM and the PM in conventional Gaussian modulation scheme. Besides, the measurement method of the prepared GMCS is experimentally demonstrated based on heterodyne detection, and both quadrature (X and P) are simultaneously measured to verify the proposed GMCS preparation scheme.

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Citation Download Citation

Heng Wang, Yaodi Pi, Wei Huang, Yun Shao, Yang Li, and Bingjie Xu "A novel experimental preparation of Gaussian modulated coherent state based on dual-drive Mach-Zehnder modulator in continuous variable quantum key distribution", Proc. SPIE 11558, Quantum and Nonlinear Optics VII, 115580O (10 October 2020); https://doi.org/10.1117/12.2573860

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