扫频相干探测光谱幅度码标记交换系统的传输性能分析

Transmission performance of spectral amplitude codes label switching system based on frequency swept coherent detection technique

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 mechanism of spectral amplitude code （SAC） and the technique of frequency swept coherent detection,we set up an optical label switching system which can detect the 156 Mbit/s label. After adding 40 Gbit/s intensity modulated （IM） payload, we research the transmission performance of the label on the condition of various local oscillator （LO） line width, power and spacing between label and payload after transmission of 0 kin,40 km and 80 kin. At the same time,we research the bit error rate （BER） of the payload on the condition of various received optical power （ROP） ,optical signal to noise ratio （OSNR） and spacing between label and payload. The results suggest that the label eye height （EH） can reach about -0. 6 dB after transmission of 80 km and when the bit error rate （BER） of payload reaches 10-9 ,the ROP and OSNR are -17. 8 dBm and -14. 5 dB,respectively.