光学学报, 2019, 39 (8): 0806005, 网络出版: 2019-08-07
利用数字正交滤波降低IM-DD模分复用传输中的信号串扰 下载: 1085次
Reducing Signal Crosstalk in IM-DD-Mode-Division Multiplexing Transmission via Digital Orthogonal Filtering
光通信 数字正交滤波 模式串扰 模分复用 optical communications digital orthogonal filtering modal crosstalk mode division multiplexing
摘要
提出了使用数字正交滤波降低LP11a和LP11b空间模式信号串扰的方法。基于模式选择性光子灯笼的强度调制直接检测(IM-DD)模分复用传输实验表明,PAM8信号在背靠背及经过500 m少模光纤的模分复用传输中,使用数字正交滤波方法结合传统的干扰抵消算法,可使信号的误码率(BER)降低至少2个数量级。该方法从信号处理的角度出发,为低成本、短距离模分复用数据传输中的模式串扰问题提供了一种解决方案。
Abstract
This study proposes a method for reducing signal crosstalk between LP11a and LP11b spatial modes via digital orthogonal filtering. The experimental results of testing the intensity-modulation direct-detection (IM-DD)-mode-division multiplexing transmission based on mode-selective photonic lanterns demonstrate that the bit error rate of the PAM8 signal can be reduced by at least two orders of magnitude via digital orthogonal filtering and conventional interference cancellation in back-to-back, 500-m few-mode fiber transmission. With respect to signal processing, this method provides a solution for modal crosstalk mitigation in low-cost, short-distance IM-DD-mode-division multiplexing transmission.
陈健, 王芳, 李正璇, 富惠雯. 利用数字正交滤波降低IM-DD模分复用传输中的信号串扰[J]. 光学学报, 2019, 39(8): 0806005. Jian Chen, Fang Wang, Zhengxuan Li, Huiwen Fu. Reducing Signal Crosstalk in IM-DD-Mode-Division Multiplexing Transmission via Digital Orthogonal Filtering[J]. Acta Optica Sinica, 2019, 39(8): 0806005.