12信道波分-模分-偏振混合复用光通信系统的性能分析

Performance analysis of 12 channels WDM-MDM-PDM optical communication system

为了提高光通信系统传输容量,提出了一个新型12信道波分-模分-偏振混合复用系统,将波分复用器与模分复用器组合放置,使系统可以适应波分模分混合复用。12个信道的信号通过少模光纤传输,结合恒模算法对输出信号解复用。应用VPI transmission Maker仿真平台,分析了波长间隔、发射机输出功率和激光器线宽对系统性能的影响。仿真结果表明:在信噪比为20 dB,发射机输出功率为0 dBm时,利用2波长6模式,每个模式携带25 Gb/s的数据,在误码率为10-4量级下,实现了25×2×6 Gb/s偏振复用二进制正交振幅调制(PDM-4QAM)信号10 km无中继传输。

In order to improve the transmission capacity of the optical communication system,this paper proposes a new type of 12 channels wavelength-mode-polarization division hybrid multiplexing system,and the wavelength division multiplexing device is combined with the mode division multiplexer,so that the system can be adapted to the wavelength-mode division hybrid multiplexing.Signals of 12 channels are transmitted by the few-mode fiber,and the output signal is decompressed with a constant mode algorithm.Through the VPI transmission Maker simulation platform,the influence of wavelength interval,transmitter output power and laser line width on the performance of the system is analyzed.The simulation results show that under the condition that the signal-to-noise ratio is 20 dB and the transmitter output power is 0 dBm,using 2 wavelengths and 6 modes,each mode carries the 25 Gb/s data,and the bit error rate is in the 10-4 volume level to realize the 25×2×6 Gb/s polarization division multiplexing-binary quadrature amplitude modulation(PDM-4QAM)signal transmits 10 km without relaying.