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基于光谱幅度码(SAC)标记的生成原理,利用扫频相干探测技术,搭建对156Mbit/s SAC标记进行识别的SAC标记交换系统。加载40Gb/s强度调制(IM)净荷信息后,分别对背靠背、40km和80km传输距离下,本振光源(LO)线宽、发射功率以及净荷与标记频率间隔对标记接收质量的影响进行仿真分析。同时分析接收光功率(ROP)、光信噪比(OSNR)、标记与净荷频率间隔对净荷误码(BER)特性的影响。结果表明:传输40 km、80 km后,标记接收眼高度(EH)与背靠背系统相比差别较小,且都能达到-0.6 dB左右;同时,传输80 km后,当净荷BER为10-9时,其ROP与OSNR分别为-17.8dBm和14.5dB。
Based on the generation principle of spectral amplitude code (SAC) markings, the SAC mark exchange system for identifying 156 Mbit / s SAC markings is constructed by swept coherent detection technology. After loading 40Gb / s IM payload information, the effects of the local oscillator light source (LO) linewidth, transmit power, and the payload and mark frequency spacing on the quality of the marked reception are analyzed respectively for back-to-back, 40km and 80km transmission distances Simulation analysis. At the same time, the influence of received light power (ROP), optical signal-to-noise ratio (OSNR) and mark and payload frequency spacing on payload BER was analyzed. The results show that the difference between the receiving eye height (EH) and the back-to-back system is small and can reach about -0.6 dB after transmitting 40 km and 80 km respectively. Meanwhile, when the payload BER is 10- 9, its ROP and OSNR were -17.8dBm and 14.5dB respectively.