Wang Zhongyang, Shen Lei, Yang Min, Tang Ziyi, Zhang Lei, Yan Changkun, Yang Liubo, Wang Ruichun, Chu Jun, Du Jing, Wang Jian
Opt Lett. 2023 Sep 1;48(17):4440-4443. doi: 10.1364/OL.495619.
Chaotic optical communication is of great significance for secure data transmission. Despite rapid development over the decades, high-speed (>100 Gbps) and long-distance (>100 km) chaotic optical communication in a single fiber is still full of challenges. Here, we propose and experimentally demonstrate high-speed and long-distance chaos-based secure optical communications using mutual injection of semiconductor lasers and space-division multiplexing (SDM) techniques. The encrypted signals are transmitted through all seven core channels of the multi-core fiber (MCF), which effectively expands the aggregate transmission capacity of a single fiber. A pair of source and synchronization devices based on mutual injection of semiconductor lasers are employed to effectively encrypt and decrypt signals. Chaos-based secure optical communications with 70-Gbps on-off keying (OOK) and 140-Gbps quadrature phase-shift keying (QPSK) signals over a 130-km MCF are successfully demonstrated in the experiment with favorable performance. The demonstration may pave the way for future ultrahigh capacity and ultra-long distance chaotic optical communications by fully exploiting multi-dimensional resources of light waves, including the spatial dimension.
混沌光通信对于安全数据传输具有重要意义。尽管在过去几十年中发展迅速，但单光纤中的高速（>100 Gbps）和长距离（>100 km）混沌光通信仍然充满挑战。在此，我们提出并通过实验演示了使用半导体激光器的相互注入和空分复用（SDM）技术实现的高速和长距离基于混沌的安全光通信。加密信号通过多芯光纤（MCF）的所有七个芯通道进行传输，这有效地扩展了单根光纤的总传输容量。采用基于半导体激光器相互注入的一对源和同步设备来有效地加密和解密信号。在实验中成功演示了基于混沌的安全光通信，其在130 km的MCF上传输70-Gbps开关键控（OOK）和140-Gbps正交相移键控（QPSK）信号，性能良好。该演示可为未来通过充分利用光波的多维资源（包括空间维度）实现超高容量和超长距离混沌光通信铺平道路。
