Nonlinear distortion compensation employing SSII cancellation in long reach OFDM PON system

非線性失真補償應用於載波間干擾消除於長距離正交分頻多工被動光網路系統

Song, C. C.(宋慈遠)

《光學工程》 125期 (2014/06) Pp. 26-33

摘要

In this work, a novel nonlinear distortion compensation employing SSII cancellation technique is proposed and experimentally demonstrated in an EAM-based IMDD OFDM system for the first time. The EAM nonlinearity-induced nonlinear distortion is regarded as part of SSII in the proposed model, so that it can be compensated by the calculated theoretical SSIL. Thus, the EAM nonlinearity- and dispersion-induced nonlinear distortion can be eliminated at the receiver simultaneously. Accordingly, the OMI of our system could be increased to reach better performance. Moreover, the SSII cancellation is demonstrated to achieve maximum 5-dB SNR improvement and 3.3-dB sensitivity improvement at FEC limit are demonstrated by incorporating the Nonlinear distortion compensation model into the SSII cancellation technique in 32-Gbps OFDM system over 150-km SSMF.

關鍵字

long-reach PON ； OFDM ； intensity modulation and direct detection

並列摘要

在這篇論文中，一個最新的非線性失真補償於子載波間干擾消除技術被提出並首次於實驗中驗證由電吸收調變器強度調變直接偵測正交分頻多工傳輸系統。而電吸收調變器非線性造成的非線性失真被考慮於我們所提出子載波干擾的模型中。因此，電吸收調變器轉換時的非線性和色散所共同造成的非線性失真可以於接收端即時估計。因此，我們系統的OMI可以增加到更好的效能。而且，子載波間干擾消除在實驗中驗證可以達到5-dB的訊噪比提升和3.3-dB的敏感度提升（FEC限制線上）藉由非線性失真補償模型用於子載間消除技術可以達到32-Gbps傳輸速率的正交分頻多工系統傳輸150公里未補償標準單模光纖。

並列關鍵字

長距離被動光網路 ； 正交分頻多工 ； 強度調變和直接偵測