Wang Longsheng, Chao Meng, Wang Anbang, Gao Hua, Li Songsui, Guo Yuanyuan, Wang Yuncai, Yan Lianshan
Opt Express. 2020 Dec 7;28(25):37919-37935. doi: 10.1364/OE.412068.
We propose a scheme of high-speed physical key distribution based on dispersion-shift-keying chaos synchronization in two semiconductor lasers without external feedback (response lasers), which are driven by a common external-cavity semiconductor laser (drive laser). In this scheme, the dispersion introduces a laser field beating-induced nonlinear transformation to the outputs of drive laser and renders the correlation elimination between the drive and response lasers improving the security of key distribution. Moreover, the commonly driven lasers without external feedback constitute an open-loop synchronization configuration and yield a short synchronization recovery time of a subnanosecond supporting the implementation of high-speed key distribution. With these two merits, we numerically demonstrate a 1.2 Gb/s secure key distribution with a bit error ratio below 3.8×10.
我们提出了一种基于色散移键控混沌同步的高速物理密钥分发方案，该方案在两个无外部反馈的半导体激光器（响应激光器）中实现，这两个响应激光器由一个公共外腔半导体激光器（驱动激光器）驱动。在该方案中，色散对外腔半导体激光器的输出引入了激光场拍频诱导的非线性变换，消除了驱动激光器和响应激光器之间的相关性，从而提高了密钥分发的安全性。此外，无外部反馈的共驱动激光器构成了一个开环同步配置，产生了亚纳秒级的短同步恢复时间，支持高速密钥分发的实现。基于这两个优点，我们通过数值模拟演示了一种误码率低于3.8×10的1.2 Gb/s安全密钥分发。
