Quantum key distribution (QKD) has a prospect to realize unconditional secure communication. However, many real system problems should be solved. Transmitters security is an important part of QKD security. And measuring photon number distribution could help improve it. This measurement is also useful for measuring unknown sources or testing newly designed sources. In this article, a method to measure the photon number distribution of pulses using non-photon-number-resolving detectors is proposed. Numerical simulation is conducted to test this scheme and performs well. Experiment on Poisson source is also used to test this method.

中文翻译：

---

使用用于量子密钥分配的非光子数分辨探测器表征脉冲源的光子数分布

量子密钥分发（QKD）具有实现无条件安全通信的前景。然而，许多实际的系统问题应该得到解决。发射器安全是 QKD 安全的重要组成部分。测量光子数分布可以帮助改善它。这种测量对于测量未知源或测试新设计的源也很有用。在本文中，提出了一种使用非光子数分辨探测器测量脉冲光子数分布的方法。对该方案进行了数值模拟测试，效果良好。泊松源实验也用于测试该方法。