Zhao Miaomiao, Li Xin, Chen Xiao, Tong Zhijian, Lyu Weichao, Zhang Zejun, Xu Jing
Opt Express. 2020 Nov 9;28(23):34450-34460. doi: 10.1364/OE.410026.
To extend the transmission distance and relax the strict alignment requirement of underwater wireless optical communication ((UWOC), we design and implement a UWOC system using a 3×1 fiber combiner and a high-sensitive multi-pixel photon counter (MPPC). The 50-m and 100-m transmission distances (corresponding to 24 attenuation lengths) are experimentally achieved with the data rates of 16.78 Mbps and 8.39 Mbps, respectively, in a 50-m standard swimming pool. Moreover, we also investigate and optimize the performance of misalignment tolerance of this system using two MPPCs as the detectors together with different diversity reception technologies. At the 50-m transmission distance, the maximum offset between the MPPC array and the light spot center can be extended to 9 m using the maximal ratio combining (MRC), while the maximum offset is 6 m when using single MPPC.
为了延长水下无线光通信（UWOC）的传输距离并放宽其严格的对准要求，我们设计并实现了一种使用3×1光纤合路器和高灵敏度多像素光子计数器（MPPC）的UWOC系统。在一个50米长的标准游泳池中，分别以16.78 Mbps和8.39 Mbps的数据速率通过实验实现了50米和100米的传输距离（对应24个衰减长度）。此外，我们还使用两个MPPC作为探测器并结合不同的分集接收技术，对该系统的失准容限性能进行了研究和优化。在50米的传输距离下，使用最大比合并（MRC）时，MPPC阵列与光斑中心之间的最大偏移可扩展到9米，而使用单个MPPC时最大偏移为6米。
