Laser & Optoelectronics Progress, Volume. 61, Issue 7, 0706015(2024)

Photocount Characteristics of SNSPD for PPM Signals in Deep-Space Laser Communication (Invited)

Xiaowei Wu1, Lei Yang1、*, Yueying Zhan1, Yang Sun1,2, Jiao Xiong1, and Qiang Wang1
Author Affiliations
  • 1Technology and Engineering Center for Space Utilization, Chinese Academy of Sciences, Beijing 100094, China
  • 2University of Chinese Academy of Sciences, Beijing 100094, China
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    Deep-space laser communication systems commonly use pulse-position modulation (PPM) to improve the energy efficiency of communication and use single-photon detectors for efficient signal reception. In particular, superconducting nanowire single-photon detectors (SNSPD) are one of the most suitable detector choices. In this study, we investigated the performance of high-speed PPM-SNSPD-based deep-space laser communications in terms of the dead time and jitter of SNSPD as well as the trailing phenomenon of high-speed pulsed signals. The photocount characteristics of SNSPD were analyzed. Based on this analysis, we proposed a bias-compensated guard-time PPM symbol synchronization algorithm. Compared with the conventional guard-time symbol synchronization algorithm, the proposed algorithm effectively reduces synchronization errors and improves system error performance.

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    Xiaowei Wu, Lei Yang, Yueying Zhan, Yang Sun, Jiao Xiong, Qiang Wang. Photocount Characteristics of SNSPD for PPM Signals in Deep-Space Laser Communication (Invited)[J]. Laser & Optoelectronics Progress, 2024, 61(7): 0706015

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    Paper Information

    Category: Fiber Optics and Optical Communications

    Received: Dec. 29, 2023

    Accepted: Feb. 19, 2024

    Published Online: Apr. 18, 2024

    The Author Email: Yang Lei (yang.lei@csu.ac.cn)

    DOI:10.3788/LOP232786

    CSTR:32186.14.LOP232786

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