应用光学, 2017, 38 (1): 136, 网络出版: 2017-02-23
基于密集波分复用的20 Gbit/s大气激光通信
20 Gbit/s atmospheric laser communication based on dense wavelength division multiplexing
光通信 大气激光通信 密集波分复用 眼图 optical communications atmospheric laser communication dense wavelength division multiplexing eye diagram
摘要
针对目前高速率信息传输的迫切需求, 设计并实验了两路数字信号密集波分复用(DWDM)的大气激光通信结构。两路激光波长分别为1 539.76 nm和1 540.55 nm, 采用强度调制, 光信号经复用和放大后, 由光学天线发射, 经1 km大气信道传输, 在接收端对光谱、波形和眼图进行了测量。实验结果显示, 在弱湍流情况下, 实现了两路光信号的解复用, 并得到了较为清晰的波形图和眼图。两路数字信号的传输速率为20 Gbit/s时, Q因子仍达到5以上。
Abstract
Due to urgent requirement for high speed transmission, digital atmospheric laser communication system based on double channel dense wavelength division multiplexing (DWDM) is experimentally demonstrated. Optical carriers are provided by two lasers at 1539.76 nm and 1540.55 nm respectively, and intensity modulation is adopted. After being multiplexed and amplified, DWDM signals are transmitted through an optical antenna. Spectrums, waveforms and eye diagrams are measured at receiver after transmission in the atmosphere via 1km. Experimental results show that DWDM signals are de-multiplexed in weak turbulence, and waveforms and eye diagrams are observed clearly. The Q-factors are more than 5 when transmitting 20 Gbit/s modulated signals simultaneously.
苏煜炜, 毕明喆, 刘鹏, 张岩, 冯湘莲, 吴志航, 李晓燕, 张鹏, 王天枢, 王舰, 吴琦, 王小婷. 基于密集波分复用的20 Gbit/s大气激光通信[J]. 应用光学, 2017, 38(1): 136. Su Yuwei, Bi Mingzhe, Liu Peng, Zhang Yan, Feng Xianglian, Wu Zhihang, Li Xiaoyan, Zhang Peng, Wang Tianshu, Wang Jian, Wu Qi, Wang Xiaoting. 20 Gbit/s atmospheric laser communication based on dense wavelength division multiplexing[J]. Journal of Applied Optics, 2017, 38(1): 136.